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Celeste International School

Grade 4 · Worksheet

The number system

Rounding decimals

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

    Round 3.9 to the nearest whole number.

  2. 2.

    Round 4.5 to the nearest whole number.

  3. 3.

    Round 0.4 to the nearest whole number.

  4. 4.

    Round 65.8 to the nearest whole number.

  5. 5.

    Round 44.4 to the nearest whole number.

  6. 6.

    Round 8.5 cm to the nearest whole centimetre.

    cm
  7. 7.

    Round 7.3 m to the nearest whole metre.

    m
  8. 8.

    Round 10.4 to the nearest whole number.

  9. 9.

    When rounding a number with 1 decimal place, when do you round UP?

    1. AWhen the tenths digit is 5, 6, 7, 8 or 9
    2. BWhen the tenths digit is 0, 1, 2, 3 or 4
    3. CAlways
    4. DNever
  10. 10.

    Marcus says 74.5 rounds to 74. Is he correct?

    1. ANo — the tenths digit is 5, so it rounds up to 75
    2. BYes, it rounds to 74
    3. CNo, it rounds to 70
    4. DYes, 74.5 is already whole
  11. 11.

    Put these numbers in order, from smallest to largest.

    Write the order (smallest to largest) in the boxes:

    • ?7.3
    • ?3.9
    • ?0.4
    • ?4.5
  12. 12.

    74.5 rounds to 75 to the nearest whole number.

    True False
  13. 13.

    Round 52.6 to the nearest whole number.

  14. 14.

    Round 90.3 to the nearest whole number.

  15. 15.

    Round 170.3 to the nearest whole number.

  16. 16.

    Round 125.7 to the nearest whole number.

  17. 17.

    Round 70.6 to the nearest whole number.

  18. 18.

    Round 12.4 to the nearest whole number.

  19. 19.

    Round 0.6 to the nearest whole number.

  20. 20.

    Round 118.2 to the nearest whole number.

Celeste International School

Answer key

The number system — Rounding decimals

  1. 1.4
  2. 2.5
  3. 3.0
  4. 4.66
  5. 5.44
  6. 6.9 cm
  7. 7.7 m
  8. 8.10
  9. 9.A. When the tenths digit is 5, 6, 7, 8 or 9
  10. 10.A. No — the tenths digit is 5, so it rounds up to 75
  11. 11.0.4, 3.9, 4.5, 7.3
  12. 12.True
  13. 13.53
  14. 14.90
  15. 15.170
  16. 16.126
  17. 17.71
  18. 18.12
  19. 19.1
  20. 20.118