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Evaluate each of the following: (i)7/(2...

Evaluate each of the following: (i)`7/(24)-(19)/(36)` (ii) `5/(63)-(-8)/(21)`

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(i)Evaluating: `7/24-19/36`
`=7/24-19/36`
Taking LCM, we get the LCM as `72`
`=(21-38)/72`
`=-17/72`
We get the answer as `-17/72`.

(ii)Evaluating: `5/63-(-8)/21`
`=5/63+8/21`
Taking LCM, we get the LCM as `63`
`=(5+24)/63`
`=29/63`
We get the answer as `29/63`.
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RD SHARMA-RATIONAL NUMBERS-All Questions
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  2. Evaluate each of the following: (i)(-5)/(14)-2/7 (ii) (13)/(15)-(12)...

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  3. Evaluate each of the following: (i)7/(24)-(19)/(36) (ii) 5/(63)-(-8)...

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  4. The sum of the two numbers is 5/9dot If one of the numbers is 1/3, Fin...

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  5. The sum of two numbers is (-1)/3 . If one of the numbers is (-12)/3 , ...

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  6. The sum of two numbers is (-4)/3 . If one of the numbers is -5 , find ...

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  7. The sum of two rational numbers is -8. If one of the numbers is (-15)/...

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  8. What number should be added to (-7)/8 so as to get 5/9?

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  9. What should be added to (-5)/(11) so as to get (26)/(33)\ ?

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  10. What number should be added to (-5)/7 to get (-2)/3?

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  11. What number should be subtracted from (-5)/3 to get 5/6?

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  12. What number should be subtracted from 3/7 to get 5/4?

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  13. What should be added to (2/3+3/5) to get (-2)/(15) ?

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  14. What should be added to (1/2+1/3+1/5) to get 3 ?

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  15. What should be subtracted from (3/4-2/3)\ to get (-1)/6 ?

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  16. Fill in the blanks : (i)(-4)/(13)-(-3)/(26)= ... (ii) (-9)/(14)+=-1 ...

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  17. Find: 3/7+ (-6/(11))+8/(21)+((-5)/(22))

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

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

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

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