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Evaluate : (-12)/5+(-7)/(20)+3/(14)+1/7+...

Evaluate : `(-12)/5+(-7)/(20)+3/(14)+1/7+(-1)/(10)`

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Verified by Experts

Evaluating:
`=-12/5+(-7)/20+3/14+1/7+(-1)/10`
`=-12/5-7/20+3/14+1/7-1/10`
Taking LCM, we get LCM as `140`.
`=(-336-49+30+20-14)/140`
`=(-399+50)/140`
`=-349/140`
Hence, we get the answer as `-349/140`.
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RD SHARMA-RATIONAL NUMBERS-All Questions
  1. Find: 3/7+ (-6/(11))+8/(21)+((-5)/(22))

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  2. Find : (-7)/4 + 5/3 + (-5)/6 + 1/3 + (-1)/2

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  3. Evaluate : (-12)/5+(-7)/(20)+3/(14)+1/7+(-1)/(10)

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  4. Find : 3/4+ ((-3)/5)+((-2)/3)+5/8+ ((-4)/(15))

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  5. Evaluate : 6/7-2+(-7)/9+(19)/(21)

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  6. Simplify : (-2)/3+5/9-(-7)/6 (ii) 5/(12)+(-5)/(18)-7/(24) gdg

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  7. Simplify each of the following and write as a rational number of the...

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  8. Simplify each of the following and write as a rational number of the...

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  9. Simplify each of the following and write as a rational number of the...

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  10. Express each of the following as a rational number of the form p/q :...

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  11. Express each of the following as a rational number of the form p/q :...

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  12. Express each of the rational number of the form p/q :-7/4+5/3+(-1)/2...

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  13. Simplify: (i)(-3)/2+5/4-7/4 (ii) 5/3-7/6+(-2)/3

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  14. Simplify: 5/4-7/6-(-2)/3 (ii) (-2)/5-(-3)/(10)-(-4)/7

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  15. Simplify: (i)5/6+(-2)/5-(-2)/(15) (ii) 3/8-(-2)/9+(-5)/(36)

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  16. Multiply : (i)3/4b y5/7 (ii) 3/7b y\ ((-4)/5) (iii)((-5)/9)\ b y\ 4...

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  17. Simplify : (i) (-8)/7xx(14)/5 (ii) (13)/6xx(-18)/(91) (iii) (-5)/...

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  18. Simplify : ((-16)/5xx(20)/8)-((15)/5xx(-35)/3)

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  19. Simplify : ((-3)/2xx4/5)+(9/5xx(-10)/3)-(1/2xx3/4)

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  20. Simplify : ((-7)/(18)xx(15)/(-7))-(1xx1/4)+\ (1/2xx1/4)

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