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The value of (2)/(5) - (-3)/(5) - (-1)/(...

The value of `(2)/(5) - (-3)/(5) - (-1)/(2) + (-1)/(2)` is

A

`-1`

B

1

C

`(1)/(10)`

D

none of these

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The value of { (2)/(5) - ((-3)/(5)) } xx {-(1)/(2) -:(-(1)/(2))} is

Using appropriate properties find : (2)/(5) xx ((-3)/(7)) - (1)/(6) xx (3)/(2) + (1)/(14) xx (2)/(5) = (2)/(5) xx ((-3)/(7)) + (1)/(14) xx (2)/(5) - (1)/(cancel6) xx (cancel 3)/(2) = (2)/(5) xx ((-3)/(7) + (1)/(14) ) - (1)/(4) = (2)/(5) xx ((-6+1)/(14))- (1)/(4) = (cancel 2)/(cancel 5) xx (-cancel 5)/(cancel14) - (1)/(4) = (-1)/(7) - (1)/(4) (- 4 - 7)/(28) = (-11)/(28)

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NAND LAL PUBLICATION-RATIONAL NUMBERS-ADDITIONAL QUESTIONS FOR PRACTICE ( Objective Type Questions)
  1. Fill in the blanks : Multiplicative inverse of a rational number is ...

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  2. Fill in the blanks : Between two rational numbers there exist ………. R...

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  3. Fill in the blanks : The rational number (1)/(2) lies between ….. An...

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  4. Fill in the blanks : Product of rational number and its reciprocal ...

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  5. Fill in the blanks : For a rational number to be positive numerator ...

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  6. Fill in the blanks : If x and y are two rational numbers then a rat...

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  7. -|-x|=- x for all rational number.

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  8. Every rational number is an integer.

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  9. Rational number are closed under the operation division.

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  10. Multiplicative inverse of (7)/(5) is - (-5)/(7)

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  11. Reciprocal of a rational number is called its multiplicative inverse.

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  12. All rational numbers can not be represented on a number line.

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  13. -(1)/(3) lies to the right of zero on the number line.

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  14. Which of the following will be true if x = - (5)/(9) and y = (2)/(9)

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  15. (-9)/(-11) is a

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  16. Multiplicative inverse of 0 is

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  17. If a=1 , b = 7 then multiplicative inverse of ab is

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  18. Which of the rational number is less than (5)/(2) a. 7/2 b. 2/3 c. 5/...

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  19. The value of (2)/(5) - (-3)/(5) - (-1)/(2) + (-1)/(2) is

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  20. The value of (-7)/(0) is

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