Class 8 Rational Number

15 Questions | Total Attempts: 121

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Class 8 Rational Number

CLASS 8 RATIONAL NUMBER


Questions and Answers
  • 1. 
    1.  What should be added to -5/4 to get -1?
    • A. 

       I.   -1/4

    • B. 

      II.   1/4

    • C. 

      III.   1

    • D. 

      IV.   -3/4

  • 2. 
    2.  What should be subtracted from -5/4 to get -1?
    • A. 

       I.   -1/4

    • B. 

      II.   1/4

    • C. 

      III.   1

    • D. 

      IV.   -3/4

  • 3. 
    3.  Which of the following is the identity element?
    • A. 

       I.   1

    • B. 

      II.   -1

    • C. 

      III.   0

    • D. 

      IV.   None of these

  • 4. 
    4.  Which of the following is the Multiplicative identity for rational numbers?
    • A. 

       I.   1

    • B. 

      II.   -1

    • C. 

      III.   0

    • D. 

      IV.   None of these

  • 5. 
    5. The sum of the rational numbers – 8/19 and -4/57 is _____
    • A. 

      (a) -5/57

    • B. 

      (b) 7/22

    • C. 

      (c) -28/57

    • D. 

      (d) 4/27

  • 6. 
    6. What number should be added to 3/8 to get -1/24? 
    • A. 

      (a) -5/12

    • B. 

      (b) -7/23

    • C. 

      (c) 31/72

    • D. 

      (d) 2/33

  • 7. 
    7. Which of the rational numbers 4/9, -5/6, -7/-12 and 11/-24 is the smallest?
    • A. 

      (a) 4/9

    • B. 

      (b) -5/6

    • C. 

      (c) -7/-12

    • D. 

      (d) 11/-24

  • 8. 
    8. Simplify: 2/3 + -4/5 + 7/15 + -11/20
    • A. 

      (a) -1/5

    • B. 

      (b) -13/60

    • C. 

      (c) -4/15

    • D. 

      (d) – 7/30

  • 9. 
    9. What number should be subtracted from -3/4 so as to get 5/6?
    • A. 

      (a) -3/10

    • B. 

      (b) -5/24

    • C. 

      (c) -19/12

    • D. 

      (d) 9/25

  • 10. 
    10. Which of the following rational numbers is in the standard form?
    • A. 

      (a) -9/28

    • B. 

      (b) -26/78

    • C. 

      (c) –14/16

    • D. 

      (d) 48/-96

  • 11. 
    11. The sum of two rational numbers is -7. If one of the numbers is –15/19, the other number is _____
    • A. 

      (a) -21/10

    • B. 

      (b) -57/16

    • C. 

      (c) 7/9

    • D. 

      (d) -118/19

  • 12. 
    12. Which of the following forms a pair of equivalent rational numbers?
    • A. 

      (a) 24/40 and 35/50

    • B. 

      (b) -25/35 and 55/-77

    • C. 

      (c) -8/15 and -24/48

    • D. 

      (d) 9/72 and -3/21

  • 13. 
    13. The value of (- 16/21 ÷ -4/3) is _____
  • 14. 
    14. Fill in the blanks: 5/12 ÷ (_____) = -35/18
  • 15. 
    15. The product of two numbers is -20/9. If one of the numbers is 4, find the other. 
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