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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 764 · 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 585 children. 442 of them are girls. How many boys are there?
  2. 2.799 − 169 =
  3. 3.? − 104 = 236
  4. 4.A train has 543 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  5. 5.A train has 322 people in the front coaches and 166 people in the back coaches. How many people are on the train?
  6. 6.691 + 120 =
  7. 7.143 + 428 =
  8. 8.820 − 448 =
  9. 9.859 − 547 =
  10. 10.? − 231 = 318
  11. 11.A school has 584 children. 430 of them are girls. How many boys are there?
  12. 12.202 − 107 =
  13. 13.201 − ? = 85
  14. 14.467 − ? = 319
  15. 15.? + 692 = 919
  16. 16.? − 623 = 124
  17. 17.A school has 272 children. 153 of them are girls. How many boys are there?
  18. 18.593 − 362 =
  19. 19.A train has 444 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  20. 20.645 − ? = 437
  21. 21.? + 102 = 894
  22. 22.A school has 322 children. 175 of them are girls. How many boys are there?
  23. 23.836 + 158 =
  24. 24.? − 478 = 181
  25. 25.910 − ? = 734
  26. 26.A school has 681 children. 295 of them are girls. How many boys are there?
  27. 27.A train has 436 people in the front coaches and 226 people in the back coaches. How many people are on the train?
  28. 28.894 + 103 =
  29. 29.241 − 146 =
  30. 30.911 − 480 =
  31. 31.A school has 213 children. 114 of them are girls. How many boys are there?
  32. 32.? + 232 = 562
  33. 33.793 + ? = 936
  34. 34.A school has 329 children. 113 of them are girls. How many boys are there?
  35. 35.127 + 833 =
  36. 36.574 − 184 =
  37. 37.252 + 598 =
  38. 38.231 + 509 =
  39. 39.404 − 360 =
  40. 40.A train has 525 people in the front coaches and 204 people in the back coaches. How many people are on the train?

Answer key

  1. 143
  2. 630
  3. 340
  4. 739
  5. 488
  6. 811
  7. 571
  8. 372
  9. 312
  10. 549
  11. 154
  12. 95
  13. 116
  14. 148
  15. 227
  16. 747
  17. 119
  18. 231
  19. 561
  20. 208
  21. 792
  22. 147
  23. 994
  24. 659
  25. 176
  26. 386
  27. 662
  28. 997
  29. 95
  30. 431
  31. 99
  32. 330
  33. 143
  34. 216
  35. 960
  36. 390
  37. 850
  38. 740
  39. 44
  40. 729

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