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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 736 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.743 + ? = 922
  2. 2.A school has 957 children. 885 of them are girls. How many boys are there?
  3. 3.566 + 293 =
  4. 4.446 − 348 =
  5. 5.134 + ? = 344
  6. 6.209 + ? = 819
  7. 7.794 + 164 =
  8. 8.A school has 838 children. 284 of them are girls. How many boys are there?
  9. 9.? − 496 = 333
  10. 10.? − 138 = 806
  11. 11.319 + 345 =
  12. 12.A school has 427 children. 148 of them are girls. How many boys are there?
  13. 13.759 + 187 =
  14. 14.A school has 618 children. 475 of them are girls. How many boys are there?
  15. 15.328 + 284 =
  16. 16.A school has 246 children. 152 of them are girls. How many boys are there?
  17. 17.A train has 724 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  18. 18.395 − ? = 244
  19. 19.A school has 658 children. 184 of them are girls. How many boys are there?
  20. 20.202 − ? = 70
  21. 21.? − 161 = 482
  22. 22.227 − 116 =
  23. 23.766 + 233 =
  24. 24.630 − ? = 455
  25. 25.A train has 401 people in the front coaches and 217 people in the back coaches. How many people are on the train?
  26. 26.439 + 107 =
  27. 27.A school has 383 children. 100 of them are girls. How many boys are there?
  28. 28.A train has 293 people in the front coaches and 363 people in the back coaches. How many people are on the train?
  29. 29.? + 690 = 932
  30. 30.A school has 733 children. 323 of them are girls. How many boys are there?
  31. 31.437 + ? = 920
  32. 32.A school has 628 children. 170 of them are girls. How many boys are there?
  33. 33.A school has 626 children. 550 of them are girls. How many boys are there?
  34. 34.672 − 514 =
  35. 35.A school has 423 children. 337 of them are girls. How many boys are there?
  36. 36.726 + ? = 945
  37. 37.A train has 423 people in the front coaches and 504 people in the back coaches. How many people are on the train?
  38. 38.929 − 385 =
  39. 39.419 + ? = 695
  40. 40.A school has 894 children. 312 of them are girls. How many boys are there?

Answer key

  1. 179
  2. 72
  3. 859
  4. 98
  5. 210
  6. 610
  7. 958
  8. 554
  9. 829
  10. 944
  11. 664
  12. 279
  13. 946
  14. 143
  15. 612
  16. 94
  17. 978
  18. 151
  19. 474
  20. 132
  21. 643
  22. 111
  23. 999
  24. 175
  25. 618
  26. 546
  27. 283
  28. 656
  29. 242
  30. 410
  31. 483
  32. 458
  33. 76
  34. 158
  35. 86
  36. 219
  37. 927
  38. 544
  39. 276
  40. 582

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