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Celeste International School

Grade 3 Β· Worksheet

Addition and subtraction of whole numbers

Adding & subtracting

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

    Calculate 235 + 174.

  2. 2.

    Calculate 607 - 391.

  3. 3.

    What is the difference between 345 and 67?

  4. 4.

    Asif needs 355 chairs for a concert. He already has 269. How many more chairs does he need?

  5. 5.

    A library has 387 books. They are given 79 more. How many books are in the library now?

  6. 6.

    A potato weighs 240 g and a carrot weighs 90 g. How much heavier is the potato than the carrot?

    g
  7. 7.

    Calculate 42 + 36.

  8. 8.

    What should you always do before you calculate an answer?

    1. Amake an estimate
    2. Bguess the answer
    3. Cround to the nearest ten thousand
  9. 9.

    Putting the parts 300 + 100 + 9 back together to make 409 is called...?

    1. Acomposing
    2. Bdecomposing
    3. Cregrouping
  10. 10.

    Which is the best estimate for 607 - 391, rounding to the nearest hundred?

    1. A100
    2. B200
    3. C300
  11. 11.

    When subtracting, you sometimes need to regroup before you can subtract the ones.

    True False
  12. 12.

    376 + 219 = 595.

    True False
  13. 13.

    A banana weighs 210 g and a carrot weighs 90 g. How much do they weigh altogether?

    g
  14. 14.

    Calculate 749 - 520.

  15. 15.

    Find the sum of 599 and 728.

  16. 16.

    Calculate 190 + 264.

  17. 17.

    Calculate 487 - 403.

  18. 18.

    Calculate 69 + 72.

  19. 19.

    Calculate 20 + 888.

  20. 20.

    Calculate 910 - 701.

Celeste International School

Answer key

Addition and subtraction of whole numbers β€” Adding & subtracting

  1. 1.409
  2. 2.216
  3. 3.278
  4. 4.86
  5. 5.466
  6. 6.150 g
  7. 7.78
  8. 8.A. make an estimate
  9. 9.A. composing
  10. 10.B. 200
  11. 11.True
  12. 12.True
  13. 13.300 g
  14. 14.229
  15. 15.1327
  16. 16.454
  17. 17.84
  18. 18.141
  19. 19.908
  20. 20.209