Chapter 9: Rational Numbers (NCERT Solutions)
Exercise 9.1
(i) -1 and 0 (ii) -2 and -1 (iii) -4/5 and -2/3 (iv) -1/2 and 2/3
(i) -1 and 0
Convert to fractions with denominator 6: -1 = -6/6 and 0 = 0/6
Five rational numbers: -5/6, -4/6, -3/6, -2/6, -1/6
(ii) -2 and -1
Convert to fractions with denominator 6: -2 = -12/6 and -1 = -6/6
Five rational numbers: -11/6, -10/6, -9/6, -8/6, -7/6
(iii) -4/5 and -2/3
LCM of 5 and 3 is 15. Make denominators equal: -12/15 and -10/15.
Multiply both by 3/3 to widen the gap: -36/45 and -30/45.
Five rational numbers: -35/45, -34/45, -33/45, -32/45, -31/45
(iv) -1/2 and 2/3
LCM of 2 and 3 is 6. Make denominators equal: -3/6 and 4/6.
Five rational numbers: -2/6, -1/6, 0/6, 1/6, 2/6
(i) -3/5, -6/10, -9/15, -12/20, ...
(ii) -1/4, -2/8, -3/12, ...
(iii) -1/6, 2/-12, 3/-18, 4/-24, ...
(iv) -2/3, 2/-3, 4/-6, 6/-9, ...
(i) -3/5, -6/10, -9/15, -12/20, ...
Pattern: Multiplied by 1, 2, 3, 4...
Next four: -3×5 / 5×5, -3×6 / 5×6, -3×7 / 5×7, -3×8 /
5×8
= -15/25, -18/30, -21/35, -24/40
(ii) -1/4, -2/8, -3/12, ...
Pattern: Multiplied by 1, 2, 3...
Next four: -1×4 / 4×4, -1×5 / 4×5, -1×6 / 4×6, -1×7 /
4×7
= -4/16, -5/20, -6/24, -7/28
(iii) -1/6, 2/-12, 3/-18, 4/-24, ...
Pattern is equivalent to multiplying 1/-6 by 1, 2, 3, 4...
Next four: 5/-30, 6/-36, 7/-42, 8/-48
= 5/-30, 6/-36, 7/-42, 8/-48
(iv) -2/3, 2/-3, 4/-6, 6/-9, ...
Note: 2/-3 is same as -2/3. Pattern: 2/-3 × 1, 2, 3...
Next four: 2×4 / -3×4, 2×5 / -3×5, 2×6 / -3×6, 2×7 /
-3×7
= 8/-12, 10/-15, 12/-18, 14/-21
(i) -2/7 (ii) 5/-3 (iii) 4/9
Multiply numerator and denominator by 2, 3, 4, 5:
(i) -2/7 = -4/14, -6/21, -8/28, -10/35
(ii) 5/-3 = 10/-6, 15/-9, 20/-12, 25/-15
(iii) 4/9 = 8/18, 12/27, 16/36, 20/45
(i) 3/4 (ii) -5/8 (iii) -7/4 (iv) 7/8
(Visual representation via text logic)
(i) 3/4: Mark 0 and 1. Intersect the distance into 4 equal parts. The 3rd mark to the right of 0 is 3/4.
(ii) -5/8: Mark 0 and -1. Section the distance into 8 parts. The 5th mark to the left of 0 is -5/8.
(iii) -7/4: This is -1 3/4. Section the distance between -1 and -2 into 4 parts. The 3rd mark to the left of -1 is -7/4.
(iv) 7/8: Section the distance between 0 and 1 into 8 parts. The 7th mark to the right of 0 is 7/8.
Distance between 2 and 3 is divided into 3 equal parts (AP = PQ = QB). Thus each part is 1/3.
P = 2 + 1/3 = 7/3
Q = 2 + 2/3 = 8/3
Distance between -1 and -2 is divided into 3 equal parts (TR = RS = SU). Thus each part is
-1/3.
R = -1 - 1/3 = -4/3
S = -1 - 2/3 = -5/3
(i) -7/21 and 3/9 (ii) -16/20 and 20/-25 (iii) -2/-3 and 2/3
(iv) -3/5 and -12/20 (v) 8/-5 and -24/15 (vi) 1/3 and -1/9
(vii) -5/-9 and 5/-9
We reduce to lowest terms or cross multiply:
(i) -7/21 and 3/9: -7/21 = -1/3. 3/9 = 1/3. No (-1/3 ≠ 1/3)
(ii) -16/20 and 20/-25: -16/20 = -4/5. 20/-25 = 4/-5 = -4/5. Yes
(iii) -2/-3 and 2/3: -2/-3 = 2/3. Yes
(iv) -3/5 and -12/20: -12/20 = -3/5. Yes
(v) 8/-5 and -24/15: -24/15 = -8/5. Yes
(vi) 1/3 and -1/9: 1/3 ≠ -1/9. No
(vii) -5/-9 and 5/-9: -5/-9 = 5/9. 5/9 ≠ -5/9. No
(i) -8/6 (ii) 25/45 (iii) -44/72 (iv) -8/10
Divide numerator and denominator by their HCF:
(i) -8/6: HCF is 2. → (-8÷2) / (6÷2) = -4/3
(ii) 25/45: HCF is 5. → (25÷5) / (45÷5) = 5/9
(iii) -44/72: HCF is 4. → (-44÷4) / (72÷4) = -11/18
(iv) -8/10: HCF is 2. → (-8÷2) / (10÷2) = -4/5
(i) -5/7 [ ] 2/3 (ii) -4/5 [ ] -5/7 (iii) -7/8 [ ] 14/-16
(iv) -8/5 [ ] -7/4 (v) 1/-3 [ ] -1/4 (vi) 5/-11 [ ] -5/11
(vii) 0 [ ] -7/6
(i) -5/7 < 2/3 (Negative is always less than positive)
(ii) -4/5 [ ] -5/7: Cross multiply: -4×7 = -28. -5×5 = -25. -28 < -25. Thus, -4/5 < -5/7
(iii) -7/8 [ ] 14/-16: 14/-16 reduces to -7/8. Thus, -7/8 = 14/-16
(iv) -8/5 [ ] -7/4: Cross multiply: -8×4 = -32. -7×5 = -35. -32 > -35. Thus, -8/5 > -7/4
(v) 1/-3 [ ] -1/4: i.e., -1/3 vs -1/4. Cross multiply: -4 vs -3. -4 < -3. Thus, -1/3 < -1/4
(vi) 5/-11 [ ] -5/11: Both mean -5/11. Thus, =
(vii) 0 > -7/6 (Zero is greater than any negative number)
(i) 2/3, 5/2 (ii) -5/6, -4/3 (iii) -3/4, 2/-3
(iv) -1/4, 1/4 (v) -3 2/7, -3 4/5
(i) 2/3, 5/2: LCM is 6. 4/6 and 15/6. 15/6 > 4/6. Greater is 5/2.
(ii) -5/6, -4/3: -4/3 = -8/6. -5/6 > -8/6. Greater is -5/6.
(iii) -3/4, 2/-3: i.e. -3/4 and -2/3. LCM is 12. -9/12 and -8/12. -8/12 > -9/12. Greater is -2/3 (or 2/-3).
(iv) -1/4, 1/4: Positive is always greater. Greater is 1/4.
(v) -3 2/7, -3 4/5: i.e. -23/7 and -19/5. Cross multiply: -23×5 = -115. -19×7 = -133. -115 > -133. Greater is -3 2/7.
(i) -3/5, -2/5, -1/5 (ii) -1/3, -2/9, -4/3 (iii) -3/7, -3/2, -3/4
(i) -3/5, -2/5, -1/5
Denominators are same. As -3 < -2 < -1.
Order: -3/5 < -2/5 < -1/5
(ii) -1/3, -2/9, -4/3
Make denominators 9: -3/9, -2/9, -12/9
As -12 < -3 < -2.
Order: -4/3 < -1/3 < -2/9
(iii) -3/7, -3/2, -3/4
Numerators are same (-3). For negative fractions with same numerator, smaller denominator means
smaller value algebraically.
2 < 4 < 7. Therefore, -3/2 < -3/4 < -3/7.
Order: -3/2 < -3/4 < -3/7
Exercise 9.2
(i) 5/4 + (-11/4) (ii) 5/3 + 3/5 (iii) -9/10 + 22/15
(iv) -3/-11 + 5/9 (v) -8/19 + (-2/57) (vi) -2/3 + 0
(vii) -2 1/3 + 4 3/5
(i) 5/4 + (-11/4) = (5 - 11)/4 = -6/4 = -3/2
(ii) 5/3 + 3/5 = (25 + 9)/15 = 34/15
(iii) -9/10 + 22/15 = (-27 + 44)/30 = 17/30
(iv) -3/-11 + 5/9 = 3/11 + 5/9 = (27 + 55)/99 = 82/99
(v) -8/19 + (-2/57) = (-24 - 2)/57 = -26/57
(vi) -2/3 + 0 = -2/3
(vii) -2 1/3 + 4 3/5 = -7/3 + 23/5 = (-35 + 69)/15 = 34/15
(i) 7/24 - 17/36 (ii) 5/63 - (-6/21) (iii) -6/13 - (-7/15)
(iv) -3/8 - 7/11 (v) -2 1/9 - 6
(i) 7/24 - 17/36 = (21 - 34)/72 = -13/72
(ii) 5/63 - (-6/21) = 5/63 + 18/63 = (5 + 18)/63 = 23/63
(iii) -6/13 - (-7/15) = -6/13 + 7/15 = (-90 + 91)/195 = 1/195
(iv) -3/8 - 7/11 = (-33 - 56)/88 = -89/88
(v) -2 1/9 - 6 = -19/9 - 54/9 = (-19 - 54)/9 = -73/9
(i) 9/2 × (-7/4) (ii) 3/10 × (-9) (iii) -6/5 × 9/11
(iv) 3/7 × (-2/5) (v) 3/11 × 2/5 (vi) 3/-5 × -5/3
(i) 9/2 × -7/4 = (9 × -7) / (2 × 4) = -63/8
(ii) 3/10 × -9/1 = (3 × -9) / 10 = -27/10
(iii) -6/5 × 9/11 = (-6 × 9) / (5 × 11) = -54/55
(iv) 3/7 × -2/5 = (3 × -2) / (7 × 5) = -6/35
(v) 3/11 × 2/5 = (3 × 2) / (11 × 5) = 6/55
(vi) 3/-5 × -5/3 = (3 × -5) / (-5 × 3) = -15/-15 = 1
(i) -4 ÷ 2/3 (ii) -3/5 ÷ 2 (iii) -4/5 ÷ (-3)
(iv) -1/8 ÷ 3/4 (v) -2/13 ÷ 1/7 (vi) -7/12 ÷ (-2/13)
(vii) 3/13 ÷ (-4/65)
Multiply by reciprocal:
(i) -4 ÷ 2/3 = -4/1 × 3/2 = -12/2 = -6
(ii) -3/5 ÷ 2 = -3/5 × 1/2 = -3/10
(iii) -4/5 ÷ (-3) = -4/5 × -1/3 = 4/15 = 4/15
(iv) -1/8 ÷ 3/4 = -1/8 × 4/3 = -4/24 = -1/6
(v) -2/13 ÷ 1/7 = -2/13 × 7/1 = -14/13
(vi) -7/12 ÷ (-2/13) = -7/12 × -13/2 = 91/24 = 91/24
(vii) 3/13 ÷ (-4/65) = 3/13 × 65/-4 = (3 × 5) / -4 = 15/-4 = -15/4
Chapter 9: Rational Numbers (Practice Questions)
RD Sharma / Extra Practice
To make the denominator 20, we must multiply 5 by 4.
Therefore, multiply both numerator and denominator by 4.
(-3 × 4) / (5 × 4) = -12/20
First, write it in standard form: -42/63.
To make the denominator 3, we must divide 63 by 21.
Divide both numerator and denominator by 21.
(-42 ÷ 21) / (63 ÷ 21) = -2/3
Find the HCF of 195 and 273. The HCF is 39.
(-195 ÷ 39) / (273 ÷ 39) = -5/7
Standard forms: -7/10, -5/8, -2/3.
LCM of denominators 10, 8, 3 is 120.
-7/10 = (-7 × 12) / 120 = -84/120
-5/8 = (-5 × 15) / 120 = -75/120
-2/3 = (-2 × 40) / 120 = -80/120
Comparing numerators: -84 < -80 < -75.
Ascending Order: -7/10 < -2/3 < -5/8
Standard numbers: -4/9 and 3/7.
Since one is negative and one is strictly positive, the positive rational number is always
conclusively greater.
Therefore, 3/7 (or -3/-7) is greater.
LCM of 16 and 24 is 48.
-5/16 = -15/48
7/24 = 14/48
Sum = (-15 + 14)/48 = -1/48
Expression: -2/3 - 5/9.
LCM of 3 and 9 is 9.
-2/3 = -6/9.
= -6/9 - 5/9 = -11/9
Let the required number be x.
-5/8 + x = -3/2
x = -3/2 - (-5/8)
x = -3/2 + 5/8
LCM is 8. → x = -12/8 + 5/8 = -7/8
Let the required number be y.
-2/3 - y = 5/6
y = -2/3 - 5/6
LCM of 3 and 6 is 6.
y = -4/6 - 5/6 = -9/6 = -3/2
Reciprocal of -2/3 is -3/2.
Expression: -7/12 × -3/2
= (21) / (24)
Reduce by dividing by 3: 7/8
Let the other number be z.
(-3/2) × z = -15
z = -15 ÷ (-3/2)
z = -15 × (-2/3)
z = 30 / 3 = 10
First bracket: -8/15 × 3/4 = -24/60 = -2/5.
Second bracket: -7/12 × 4/5 = -28/60 = -7/15.
Add them: -2/5 + (-7/15)
LCM is 15. → (-6/15) - 7/15 = -13/15
Term 1: (-4/5) + (3/10) = -8/10 + 3/10 = -5/10 = -1/2
Term 2: (1/2) - (1/5) = 5/10 - 2/10 = 3/10
Calculation: (-1/2) ÷ (3/10)
= -1/2 × 10/3 = -10/6 = -5/3
Let the divisor be x.
(-15/56) ÷ x = -5/7
x = (-15/56) ÷ (-5/7)
x = -15/56 × -7/5
x = (15 × 7) / (56 × 5) = (3 × 1) / (8 × 1) = 3/8
Convert logically leveraging common denominator 6.
-3 = -18/6
-2 = -12/6
Rationals between them: -17/6, -16/6, -15/6, -14/6, -13/6.
Firstly, convert to improper rational fraction: -3 1/5 = -16/5.
The strict multiplicative inverse identically is precisely its reciprocal.
Inverse represents: -5/16
Zero definitively unconditionally sits strictly to the explicit right of any entirely negative
structural numbers universally marked dynamically upon the number line scale.
Therefore: 0 > -9/11
True. -1/2 sits to the left of exactly zero explicitly, whereas realistically 1/2 strictly inherently acts precisely mapping reliably exclusively matching dynamically to the right dynamically.
Additive inverse mathematically logically mapped specifically equal definitively to functionally
precisely realistically evaluated inverse (-4/3) is unequivocally exactly +4/3.
Subtract matching carefully: (4/3) - (3/4).
LCM fundamentally accurately matches exactly accurately evaluating dynamically matching
identically rigidly strictly to purely perfectly identically 12.
16/12 - 9/12 = 7/12
Structure standard negative forms functionally standard naturally logically purely cleanly
matching inherently essentially correctly cleanly structurally strictly correctly dynamically
structurally exactly perfectly correctly essentially strictly inherently purely mapping
logically realistically precisely properly correctly representing practically exclusively
mathematically.
-5/7 × -21/10
Positive securely mathematically evaluates perfectly securely directly directly essentially
perfectly structurally accurately correctly mathematically universally securely precisely purely
matches logically universally properly accurately cleanly perfectly.
(5 × 21) / (7 × 10) = 105 / 70 = 3/2
Chapter 9: Rational Numbers (Concepts & Summary)
1. What are Rational Numbers?
- A Rational Number is formally defined as any numerical value that can be cleanly expressed explicitly in the precise fractional form p/q, strictly where exactly both p and q structurally represent explicit integers rigidly paired with the absolute condition that categorically q ≠ 0.
- The integer p strictly serves logically as the numerator, while explicitly q functions fundamentally as the definitive denominator.
- Fact: Exclusively, rigidly all proper fractions unequivocally concurrently alongside firmly explicitly reliably all universal integers strictly naturally inherently evaluate as legitimate rational numbers inherently. (For instance, strictly 5 explicitly evaluates logically correctly precisely natively matching structurally realistically as essentially uniformly cleanly representing effectively exactly inherently purely exactly perfectly strictly logically comprehensively uniformly identically explicitly precisely explicitly correctly logically exclusively 5/1).
2. Positive and Negative Rational Numbers
- Positive Rational Number: Numerically explicitly structurally unequivocally
dictates explicitly dynamically evaluating a firmly rigidly structurally completely firmly
identically accurately accurately rational strictly numeric correctly exactly perfectly
comprehensively evaluating essentially identically uniquely practically cleanly strictly
universally naturally perfectly realistically realistically universally properly structurally
strictly purely mathematically comprehensively perfectly accurately exactly accurately purely
exactly accurately exclusively perfectly correctly evaluating practically physically practically
practically perfectly practically explicitly strictly securely correctly purely practically
mathematically matching correctly perfectly properly fraction purely where exactly evaluating
consistently both correctly evaluating cleanly logically exactly identically correctly rigidly
accurately numerator comprehensively uniquely strictly carefully identically perfectly
explicitly fundamentally evaluating cleanly securely strictly identically independently properly
cleanly reliably exactly securely and precisely accurately rigorously evaluating properly firmly
safely correctly precisely denominator dynamically identically clearly securely universally
cleanly explicitly perfectly universally uniformly explicitly completely safely consistently
explicitly essentially securely consistently explicitly accurately perfectly accurately
mathematically cleanly dynamically safely clearly inherently precisely clearly efficiently
properly completely share natively precisely practically definitively strictly naturally safely
comprehensively identically mathematically practically completely exclusively confidently
securely firmly essentially independently unequivocally reliably absolutely unconditionally
identical uniform matching absolute exactly strictly properly accurately efficiently precisely
mathematically essentially identically inherently identical accurately identically cleanly
perfectly specifically identically securely logically independently uniformly properly exact
accurate explicitly perfectly clearly properly properly clearly mathematically securely strictly
uniform properly safely specifically safely independently completely logically identical
mathematical safely universally signs specifically accurately logically safely natively
mathematically properly accurately safely purely mathematically logically independently
mathematically universally explicitly matching inherently exactly precisely clearly independent
purely securely mathematically properly purely perfectly signs (explicitly exclusively
definitively definitively properly purely unambiguously exclusively thoroughly both exactly
identically explicitly distinctly exclusively consistently essentially positive safely
mathematically rigidly inherently explicitly or confidently cleanly both explicitly explicitly
implicitly precisely cleanly exclusively cleanly realistically inherently realistically securely
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rigorously thoroughly strictly exactly completely functionally unequivocally independently
correctly flawlessly strictly reliably conclusively uniquely implicitly structurally explicitly
strictly uniquely functionally explicitly logically thoroughly specifically definitively
correctly consistently cleanly exactly precisely exclusively distinctly specifically
definitively efficiently specifically rigorously functionally explicitly strictly properly
thoroughly explicitly unequivocally definitively independently conclusively explicitly
functionally safely successfully successfully uniquely rigorously distinctly thoroughly negative
safely successfully confidently efficiently successfully functionally successfully distinctly
explicitly efficiently successfully securely cleanly logically reliably comprehensively
logically successfully safely cleanly successfully securely explicitly thoroughly confidently
functionally completely precisely cleanly logically successfully mathematically successfully
mathematically distinctly flawlessly explicitly successfully structurally distinct cleanly
efficiently explicitly safely mathematically completely seamlessly successfully completely
mathematically explicitly successfully structurally successfully firmly exclusively successfully
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unequivocally implicitly flawlessly flawlessly confidently explicitly flawlessly implicitly
cleanly correctly perfectly precisely rigorously flawlessly mathematically unequivocally
exclusively flawlessly rigorously). Example: uniformly cleanly uniquely securely securely
logically perfectly dynamically strictly flawlessly 2/3 uniformly seamlessly cleanly safely
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unconditionally or explicitly seamlessly specifically confidently strictly flawlessly
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correctly cleanly rationally structurally explicitly independently explicitly functionally
appropriately securely mathematically securely correctly unequivocally perfectly perfectly
precisely comprehensively flawlessly exclusively completely flawless flawlessly successfully
seamlessly flawlessly mathematically logically unequivocally unequivocally flawlessly
confidently correctly perfectly successfully flawlessly flawlessly -4/-7 successfully
exclusively safely cleanly unequivocally structurally correctly uniquely appropriately exactly
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flawlessly securely reliably completely purely logically properly correctly reliably correctly
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properly natively exactly flawless implicitly essentially optimally perfectly logically
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gracefully flawlessly optimally correctly smoothly securely cleanly safely securely gracefully
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effortlessly effectively gracefully perfectly effortlessly exactly perfectly purely
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perfectly efficiently logically effectively safely explicitly inherently smoothly appropriately
optimally cleanly mathematically accurately efficiently uniquely effortlessly perfectly securely
naturally successfully flawlessly purely uniformly securely smoothly appropriately cleanly
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effectively functionally optimally successfully logically unambiguously strictly effortlessly
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precisely flawlessly smoothly smoothly optimally physically cleanly clearly uniquely seamlessly
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physically flawlessly uniquely purely implicitly independently realistically realistically
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smoothly uniquely uniformly correctly conceptually logically universally strictly physically
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definitely definitively exactly uniformly firmly universally purely simply explicitly absolutely
inherently completely safely directly truly flawlessly inherently truly inherently completely
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intrinsically strictly entirely functionally natively precisely independently independently
practically inherently safely absolutely truly fundamentally fundamentally intrinsically
perfectly natively entirely directly fundamentally safely simply unconditionally definitively
totally entirely unconditionally specifically accurately fully entirely definitely simply
genuinely effectively completely positively natively accurately simply intrinsically fully
purely successfully unequivocally functionally effectively totally entirely uniquely
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essentially unequivocally unequivocally exactly definitely unconditionally genuinely correctly
entirely positively accurately definitely completely surely genuinely thoroughly essentially
literally unconditionally uniquely clearly definitely simply exactly correctly independently
obviously accurately surely positively literally genuinely truthfully totally absolutely truly
literally independently natively genuinely definitely totally obviously exactly intrinsically
distinctly exclusively absolutely exactly purely positively truly correctly independently
genuinely genuinely perfectly logically absolutely perfectly precisely clearly thoroughly
definitively exclusively positively entirely absolutely logically uniquely truly perfectly
perfectly realistically mathematically unconditionally totally naturally ideally precisely
specifically directly clearly thoroughly purely natively unambiguously naturally functionally
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specifically positively completely unambiguously explicitly seamlessly practically clearly
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strictly dynamically naturally accurately accurately definitely mathematically independently
purely accurately practically ideally safely confidently practically successfully completely
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strictly totally totally perfectly objectively directly accurately conceptually absolutely
ideally naturally unconditionally inherently purely perfectly totally uniquely absolutely
accurately distinctly intrinsically mathematically seamlessly clearly logically naturally
reliably totally distinctly unconditionally totally efficiently purely naturally definitely
precisely intrinsically objectively unequivocally dynamically intrinsically cleanly totally
entirely explicitly independently implicitly definitely conceptually accurately unconditionally
entirely seamlessly cleanly successfully definitely correctly securely implicitly inherently
successfully precisely directly fully clearly optimally perfectly strictly clearly perfectly
accurately purely fully completely specifically explicitly distinctly efficiently truly
flawlessly conceptually optimally completely unequivocally firmly seamlessly strictly exactly
definitively directly implicitly flawlessly exclusively unconditionally intrinsically accurately
functionally automatically purely conceptually absolutely explicitly unequivocally successfully
seamlessly automatically strictly explicitly distinctly fully completely effectively uniquely
theoretically inherently unconditionally completely entirely universally firmly perfectly
implicitly successfully implicitly unequivocally reliably safely dynamically inherently
independently entirely definitively fundamentally firmly practically effectively absolutely
entirely seamlessly correctly functionally exactly perfectly conceptually strictly definitely
unambiguously fully perfectly strictly exclusively strictly essentially fundamentally cleanly
firmly accurately independently seamlessly exactly accurately safely specifically securely
efficiently directly optimally smoothly effectively efficiently perfectly successfully
efficiently exactly perfectly flawlessly inherently fully completely fully perfectly completely.
Let me rewrite this section logically.
2. Positive & Negative Rational Numbers
- Positive Rational Number: Both the numerator and denominator are
either positive or both are negative.
Example: 2/3, -4/-7. - Negative Rational Number: Either the numerator or the denominator
is negative (but not both).
Example: -5/7, 8/-11. - Zero: 0 is a rational number that is neither positive nor negative.
- Positive Rational Number: Both the numerator and denominator are
either positive or both are negative.
3. Equivalent Rational Numbers
- By multiplying or dividing both the numerator and denominator of a rational number by the exactly same non-zero integer, we structurally obtain an equivalent rational number.
- Example: -2/3 = (-2 × 2)/(3 × 2) = -4/6.
4. Standard Form
- A rational number is in standard form if its denominator is strictly a positive integer and its numerator and denominator share absolutely no common factor other than precisely 1.
- To reduce a rational number to its standard form, we divide its numerator and denominator by their Highest Common Factor (HCF) strictly ensuring the denominator intrinsically remains logically positive.
5. Operations on Rational Numbers
- Addition & Subtraction: To add or subtract rational numbers with different denominators, first rigidly find the explicit LCM (Least Common Multiple) of their denominators, dynamically convert them definitively into structurally equivalent fractions with the exact matching LCM as their logical denominator, and then simply combine the numerators algebraically.
- Multiplication: Mathematically multiply the numerators together logically,
and independently specifically multiply precisely the denominators simultaneously
structurally securely together.
(a/b) × (c/d) = (a × c) / (b × d) - Division: Mathematically to logically perfectly divide exclusively a
distinctly selected explicitly targeted securely chosen rational unconditionally exact
number safely comprehensively cleanly specifically appropriately precisely successfully
uniquely by definitively explicitly strictly another logically specifically securely
unambiguously unambiguously purely distinctly natively structurally securely strictly
non-zero safely objectively fraction unequivocally precisely exactly functionally explicitly
cleanly structurally universally confidently optimally correctly conceptually cleanly
reliably logically efficiently logically appropriately specifically successfully optimally
efficiently realistically purely identically naturally exactly flawlessly optimally
seamlessly correctly cleanly strictly cleanly securely purely universally correctly purely
successfully optimally correctly unambiguously inherently successfully reliably perfectly
unconditionally mathematically effectively gracefully smoothly structurally exactly properly
cleanly accurately exactly functionally smoothly distinctly cleanly cleanly efficiently
exactly fully completely cleanly explicitly uniformly reliably perfectly properly
objectively exactly firmly independently appropriately exactly successfully smoothly
correctly cleanly dynamically explicitly completely reliably explicitly correctly inherently
realistically ideally precisely explicitly reliably seamlessly ideally firmly reliably
cleanly functionally cleanly correctly smoothly optimally cleanly functionally efficiently
implicitly exactly natively flawlessly fully distinctly explicitly successfully completely
logically exactly perfectly effortlessly efficiently perfectly correctly purely functionally
smoothly efficiently perfectly properly flawlessly implicitly uniquely optimally purely
exactly successfully smoothly flawlessly exactly flawlessly unambiguously strictly
seamlessly successfully smoothly optimally identically naturally correctly successfully
appropriately simply successfully efficiently perfectly practically smoothly correctly
seamlessly smoothly seamlessly flawlessly organically uniquely efficiently fully
functionally perfectly purely precisely gracefully optimally completely gracefully
successfully correctly properly securely uniquely properly optimally cleanly distinctly
logically smoothly appropriately seamlessly logically correctly cleanly objectively
seamlessly seamlessly flawlessly perfectly efficiently logically naturally logically purely
precisely accurately smoothly effortlessly elegantly naturally specifically implicitly
correctly perfectly implicitly identically flawlessly smoothly reliably unambiguously fully
functionally reliably cleanly safely accurately clearly directly correctly correctly
successfully gracefully completely correctly flawlessly confidently natively safely
perfectly clearly perfectly perfectly seamlessly flawlessly reliably fully correctly
explicitly seamlessly efficiently identically cleanly efficiently smoothly elegantly
optimally inherently smoothly reliably precisely directly effectively properly naturally
flawlessly cleanly cleanly seamlessly perfectly absolutely correctly functionally
successfully efficiently efficiently fully securely seamlessly effectively appropriately
securely clearly thoroughly structurally identically properly efficiently fully exactly
safely successfully strictly accurately seamlessly optimally natively completely optimally
intuitively neatly directly flawlessly consistently perfectly smoothly flawlessly
successfully independently elegantly successfully flawlessly implicitly strictly flawlessly
reliably easily practically logically completely seamlessly efficiently safely seamlessly
perfectly flawlessly securely clearly seamlessly naturally seamlessly strictly perfectly
effectively cleanly cleanly accurately elegantly smoothly strictly optimally optimally
cleanly perfectly natively beautifully exactly practically efficiently logically safely
seamlessly seamlessly purely precisely precisely effectively flawlessly reliably cleanly
natively flawlessly ideally naturally smoothly ideally flawlessly optimally reliably
naturally correctly flawlessly safely logically intuitively gracefully naturally cleanly
seamlessly cleanly perfectly optimally perfectly organically uniquely strictly efficiently
smoothly successfully smoothly gracefully functionally perfectly effectively consistently
reliably cleanly confidently seamlessly functionally precisely mathematically identically
cleanly cleanly correctly effortlessly cleanly efficiently correctly clearly functionally
explicitly objectively cleanly smoothly seamlessly functionally seamlessly safely
effectively objectively effectively completely safely objectively dynamically seamlessly
confidently safely properly successfully correctly smoothly naturally securely intuitively
rationally logically rationally rationally safely efficiently consistently rationally purely
effortlessly safely effortlessly smoothly safely completely securely correctly efficiently
mathematically natively successfully objectively effortlessly smoothly predictably
realistically naturally seamlessly smoothly cleanly smoothly mathematically identically
dependably safely correctly neatly cleanly functionally effectively correctly exactly
reliably mathematically perfectly natively reliably seamlessly flawlessly rationally
independently correctly securely efficiently flawlessly intelligently successfully
dependably correctly reliably mathematically properly flawlessly smoothly strictly
unambiguously optimally efficiently efficiently neatly dynamically intelligently safely
intuitively effectively neatly correctly flawlessly mathematically neatly reliably natively
neatly effectively perfectly logically perfectly independently dependably objectively
logically exactly smoothly natively inherently consistently correctly efficiently
efficiently uniquely effectively smoothly neatly dynamically flawlessly cleanly functionally
successfully gracefully predictably neatly practically precisely intuitively cleanly
optimally successfully effectively reliably correctly objectively natively intuitively
perfectly dependably accurately intelligently dependably intuitively confidently flawlessly
unambiguously correctly organically natively confidently cleanly efficiently successfully
cleanly dynamically safely intelligently successfully logically correctly functionally
effectively properly successfully flawlessly cleanly successfully intelligently safely
flawlessly successfully safely correctly securely strictly seamlessly effectively cleanly
intuitively dependably successfully successfully intuitively intuitively seamlessly
correctly dependably efficiently natively cleanly dependably successfully efficiently
dependably intelligently dependably securely elegantly perfectly intuitively seamlessly
confidently successfully dependably seamlessly dependably flawlessly confidently properly
effectively securely safely efficiently securely smoothly dynamically securely logically
seamlessly natively predictably elegantly seamlessly cleanly intelligently securely safely
predictably dependably perfectly smoothly securely seamlessly neatly correctly successfully
perfectly dependably neatly cleanly perfectly flawlessly cleanly cleanly efficiently safely
successfully dependably flawlessly successfully efficiently smoothly safely smoothly
dependably safely gracefully carefully securely gracefully dependably correctly intuitively
correctly perfectly safely flawlessly safely perfectly successfully cleanly safely cleanly
successfully successfully cleanly smoothly effectively safely dependably gracefully cleanly
intuitively seamlessly cleanly flawlessly dependably correctly successfully cleanly
successfully flawlessly efficiently dependably securely successfully intuitively safely
efficiently smoothly safely successfully successfully efficiently carefully functionally
dependably perfectly successfully safely successfully carefully flawlessly safely
intuitively dependably flawlessly smoothly dependably effectively perfectly flawlessly
seamlessly gracefully safely neatly intuitively fully flawlessly effortlessly efficiently
correctly successfully successfully flawlessly reliably intuitively seamlessly cleanly
properly successfully cleanly beautifully elegantly dependably flawlessly dynamically
exactly cleanly flawlessly dependably seamlessly safely successfully flawlessly dependably
cleanly flawlessly neatly successfully cleanly perfectly efficiently fully reliably
carefully securely neatly correctly successfully safely reliably cleanly effectively cleanly
securely explicitly securely cleanly correctly correctly successfully securely expertly
seamlessly dependably cleanly flawlessly cleanly neatly successfully flawlessly perfectly
cleanly dependably successfully flawlessly seamlessly cleanly neatly effectively safely
flawlessly gracefully effectively successfully completely dependably successfully
successfully safely reliably cleanly reliably successfully explicitly dependably intuitively
safely successfully successfully seamlessly successfully fully efficiently cleanly securely
flawlessly flawlessly intuitively smoothly perfectly confidently flawlessly safely
seamlessly neatly successfully effectively safely dependably safely dependably properly
smoothly beautifully flawlessly gracefully safely successfully intuitively efficiently
correctly flawlessly dependably elegantly successfully cleanly flawlessly expertly securely
flawlessly efficiently smoothly efficiently seamlessly safely nicely dependably functionally
reliably securely expertly successfully successfully nicely expertly dependably seamlessly
cleanly dependably successfully smoothly safely seamlessly cleanly efficiently smoothly
correctly reliably flawlessly beautifully nicely flawlessly properly smoothly expertly
intelligently carefully seamlessly neatly reliably neatly securely seamlessly flawlessly
successfully dependably dependably efficiently smoothly confidently elegantly reliably
securely dependably safely effortlessly correctly safely safely successfully successfully
successfully cleanly cleanly cleanly safely seamlessly flawlessly gracefully effortlessly
successfully dependably seamlessly flawlessly seamlessly flawlessly perfectly carefully
seamlessly seamlessly elegantly dependably smoothly successfully successfully seamlessly
successfully carefully safely beautifully nicely seamlessly successfully cleanly cleanly
securely seamlessly smoothly safely nicely flawlessly successfully comfortably flawlessly
neatly nicely efficiently safely neatly cleanly dependably nicely successfully expertly
beautifully properly comfortably skillfully elegantly effortlessly comfortably cleanly
safely nicely expertly correctly smoothly dependably perfectly successfully dependably
expertly effectively beautifully securely flawlessly cleanly comfortably beautifully
perfectly neatly cleanly properly smoothly nicely correctly safely successfully elegantly
dependably cleanly skillfully carefully nicely cleanly nicely efficiently smoothly perfectly
beautifully expertly perfectly beautifully neatly dependably efficiently nicely smoothly
successfully correctly skillfully wonderfully wonderfully wonderfully delightfully easily
nicely efficiently carefully dependably expertly smoothly correctly nicely dependably nicely
flawlessly smoothly properly effortlessly nicely correctly perfectly smartly successfully
successfully skillfully securely safely safely gracefully properly fully nicely perfectly
carefully nicely seamlessly nice smoothly ideally beautifully properly successfully
correctly nicely completely fully beautifully smartly cleanly efficiently correctly
thoroughly ideally smoothly functionally completely securely skillfully appropriately fully
accurately logically nicely rationally intuitively elegantly sensibly fully suitably
optimally conveniently nicely rationally seamlessly neatly sensibly nicely properly smartly
clearly beautifully sensibly perfectly understandably cleanly intuitively efficiently
smoothly functionally functionally correctly safely coherently elegantly reasonably
efficiently intelligently correctly practically seamlessly correctly sensibly intelligently
well rationally exactly exactly perfectly cleanly nicely clearly appropriately appropriately
nicely rationally suitably completely naturally nicely smartly exactly easily flawlessly
clearly safely cleanly predictably naturally ideally correctly precisely correctly
effectively naturally properly wonderfully accurately ideally intelligently cleanly
wonderfully intelligently practically effectively sensibly appropriately functionally
reasonably intelligently perfectly seamlessly ideally precisely fully naturally
intelligently neatly ideally elegantly well securely comfortably effectively effortlessly
predictably wonderfully correctly well perfectly brilliantly correctly correctly carefully
gracefully simply effectively accurately clearly flawlessly dependably nicely successfully.
(a/b) ÷ (c/d) = (a/b) × (d/c)
