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

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

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RD SHARMA ENGLISH-OPERATIONS ON RATIONAL NUMBERS-All Questions
  1. What number should be subtracted from (-5)/3 to get 5/6?

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  2. What number should be subtracted from 3 1/2 to get 1 2/7

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

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

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

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

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

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

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  9. Fill in the blanks: (i) (-7)/9+( )=3 (ii) ( ) +(15)/(23)=4

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  10. Multiply: (i)3/4\ by 5/7 (ii) 3/7 by ((-4)/5)

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  11. Multiply: (i)((-5)/9) by 4 (ii) ((-36)/7) by (-(28)/9)

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

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  13. Simplify: (i)(-5)/9xx(72)/(-125) (ii) (-22)/9xx(-51)/(-88)

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  14. Simplify: (i) ((-16)/5xx(20)/8)-((15)/5xx(-35)/5) (ii) ((-3)/2xx4/5...

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  15. Multiply: (i)7/(11)b y5/4 (ii) 5/7b y(-3)/4

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  16. Multiply: (i)(-2)/9b y5/(11) (ii) (-3)/(17)b y(-5)/(-4)

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  17. Multiply: (i)(-5)/(17)b y(51)/(-60) (ii) (-6)/(11)b y(-55)/(36)

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  18. Multiply: (i)(-8)/(25) by (-5)/(16) (ii) 6/7 by (-49)/(36)

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  19. Simplify each of the following and express the result as a rational ...

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  20. Simplify each of the following and express the result as a rational ...

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