g
Gyaan Maths
CBSE · Class 6-12
Back to chapter
CBSE Maths · Class 8

Chapter 3: A Story of Numbers

Name: ________________________
Date: ______________
Marks: ____ / 6

Rational numbers: representation, operations, properties.

Questions

  1. Add inverse of −79\tfrac{-7}{9}.
  2. Reciprocal of 45\tfrac 45.
  3. 23−14\tfrac 23 - \tfrac 14.
  4. (−23)×35(-\tfrac 23)\times \tfrac 35.
  5. 78÷−14\tfrac 78 \div \tfrac{-1}{4}.
  6. Which is additive identity?

Extra Practice (Optional)

  • [object Object]
  • [object Object]
  • [object Object]
  • [object Object]

Answer Key (For Teachers)

  1. Answer: 79\tfrac 79
    Working: Negate.
  2. Answer: 54\tfrac 54
    Working: Flip.
  3. Answer: 512\tfrac 5{12}
    Working: LCD 12: 812−312\tfrac 8{12}-\tfrac 3{12}.
  4. Answer: −25\tfrac{-2}{5}
    Working: −615=−25\tfrac{-6}{15}=\tfrac{-2}{5}.
  5. Answer: −288=−72\tfrac{-28}{8}=\tfrac{-7}{2}
    Working: Multiply reciprocal.
  6. Answer: 00
    Working: a+0=aa+0=a.
Gyaan Maths · CBSE Class 8 · Chapter 3
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026