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Celeste International School

Grade 4 · Worksheet

The number system

Multiply & divide by 10, 100, 1000

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    358 × 100 = ?

  2. 2.

    2700 ÷ 100 = ?

  3. 3.

    456 × 1000 = ?

  4. 4.

    5600 ÷ 1000 = ?

  5. 5.

    3.45 × 100 = ?

  6. 6.

    16.8 ÷ 10 = ?

  7. 7.

    6.5 × 10 = ?

  8. 8.

    What number is ten times bigger than 0.03?

  9. 9.

    Sofia multiplies a number by 10, then by 10 again, then by 10 again. Her answer is 20000. What number did she start with?

  10. 10.

    When you multiply a whole number by 10, what happens to its digits?

    1. AThey move one place to the left, so the number gets bigger
    2. BThey move one place to the right, so the number gets smaller
    3. CThey stay in the same place
    4. DThey swap around
  11. 11.

    358 × 100 = 35800.

    True False
  12. 12.

    2700 ÷ 100 = 270.

    True False
  13. 13.

    625 × 100 = ?

  14. 14.

    18300 ÷ 100 = ?

  15. 15.

    11000 ÷ 1000 = ?

  16. 16.

    91.5 × 100 = ?

  17. 17.

    71.6 × 100 = ?

  18. 18.

    4200 ÷ 100 = ?

  19. 19.

    4 × 100 = ?

  20. 20.

    85200 ÷ 100 = ?

Celeste International School

Answer key

The number system — Multiply & divide by 10, 100, 1000

  1. 1.35800
  2. 2.27
  3. 3.456000
  4. 4.5.6
  5. 5.345
  6. 6.1.68
  7. 7.65
  8. 8.0.3
  9. 9.20
  10. 10.A. They move one place to the left, so the number gets bigger
  11. 11.True
  12. 12.False
  13. 13.62500
  14. 14.183
  15. 15.11
  16. 16.9150
  17. 17.7160
  18. 18.42
  19. 19.400
  20. 20.852