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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 634 · 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.A school has 278 children. 122 of them are girls. How many boys are there?
  2. 2.A school has 439 children. 396 of them are girls. How many boys are there?
  3. 3.401 − 342 =
  4. 4.975 − 111 =
  5. 5.501 + ? = 747
  6. 6.? − 209 = 339
  7. 7.A train has 155 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  8. 8.991 − 483 =
  9. 9.A school has 373 children. 368 of them are girls. How many boys are there?
  10. 10.970 − ? = 698
  11. 11.? + 214 = 552
  12. 12.889 + 100 =
  13. 13.307 − 304 =
  14. 14.807 − 630 =
  15. 15.398 + 286 =
  16. 16.495 − 490 =
  17. 17.340 + 111 =
  18. 18.428 − ? = 38
  19. 19.A train has 640 people in the front coaches and 281 people in the back coaches. How many people are on the train?
  20. 20.274 − 159 =
  21. 21.A school has 897 children. 624 of them are girls. How many boys are there?
  22. 22.? − 480 = 131
  23. 23.A train has 675 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  24. 24.850 − 608 =
  25. 25.581 + ? = 704
  26. 26.A train has 231 people in the front coaches and 472 people in the back coaches. How many people are on the train?
  27. 27.? + 217 = 789
  28. 28.A train has 499 people in the front coaches and 500 people in the back coaches. How many people are on the train?
  29. 29.222 + ? = 982
  30. 30.385 + 224 =
  31. 31.? + 672 = 901
  32. 32.A school has 958 children. 525 of them are girls. How many boys are there?
  33. 33.845 + 149 =
  34. 34.A train has 709 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  35. 35.408 − ? = 58
  36. 36.586 + ? = 833
  37. 37.330 + 264 =
  38. 38.A train has 602 people in the front coaches and 275 people in the back coaches. How many people are on the train?
  39. 39.145 + 408 =
  40. 40.A train has 878 people in the front coaches and 109 people in the back coaches. How many people are on the train?

Answer key

  1. 156
  2. 43
  3. 59
  4. 864
  5. 246
  6. 548
  7. 263
  8. 508
  9. 5
  10. 272
  11. 338
  12. 989
  13. 3
  14. 177
  15. 684
  16. 5
  17. 451
  18. 390
  19. 921
  20. 115
  21. 273
  22. 611
  23. 997
  24. 242
  25. 123
  26. 703
  27. 572
  28. 999
  29. 760
  30. 609
  31. 229
  32. 433
  33. 994
  34. 823
  35. 350
  36. 247
  37. 594
  38. 877
  39. 553
  40. 987

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