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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 344 · 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 707 children. 544 of them are girls. How many boys are there?
  2. 2.A school has 638 children. 277 of them are girls. How many boys are there?
  3. 3.344 − 129 =
  4. 4.A train has 616 people in the front coaches and 244 people in the back coaches. How many people are on the train?
  5. 5.369 + ? = 683
  6. 6.A school has 943 children. 346 of them are girls. How many boys are there?
  7. 7.? + 759 = 898
  8. 8.A train has 668 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  9. 9.788 − 257 =
  10. 10.A school has 424 children. 411 of them are girls. How many boys are there?
  11. 11.830 + ? = 978
  12. 12.? − 433 = 93
  13. 13.888 + 105 =
  14. 14.A school has 865 children. 762 of them are girls. How many boys are there?
  15. 15.765 − 559 =
  16. 16.330 + 266 =
  17. 17.223 − ? = 58
  18. 18.801 − 719 =
  19. 19.388 − 100 =
  20. 20.507 − 328 =
  21. 21.972 − 456 =
  22. 22.A train has 314 people in the front coaches and 483 people in the back coaches. How many people are on the train?
  23. 23.A train has 479 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  24. 24.? + 805 = 960
  25. 25.A school has 350 children. 316 of them are girls. How many boys are there?
  26. 26.A school has 535 children. 210 of them are girls. How many boys are there?
  27. 27.183 + 208 =
  28. 28.A train has 494 people in the front coaches and 352 people in the back coaches. How many people are on the train?
  29. 29.537 + 317 =
  30. 30.A train has 197 people in the front coaches and 671 people in the back coaches. How many people are on the train?
  31. 31.A train has 176 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  32. 32.395 + ? = 618
  33. 33.A school has 644 children. 411 of them are girls. How many boys are there?
  34. 34.A train has 115 people in the front coaches and 238 people in the back coaches. How many people are on the train?
  35. 35.? − 624 = 109
  36. 36.329 − 327 =
  37. 37.A train has 419 people in the front coaches and 498 people in the back coaches. How many people are on the train?
  38. 38.527 − ? = 343
  39. 39.205 − ? = 95
  40. 40.A school has 802 children. 754 of them are girls. How many boys are there?

Answer key

  1. 163
  2. 361
  3. 215
  4. 860
  5. 314
  6. 597
  7. 139
  8. 797
  9. 531
  10. 13
  11. 148
  12. 526
  13. 993
  14. 103
  15. 206
  16. 596
  17. 165
  18. 82
  19. 288
  20. 179
  21. 516
  22. 797
  23. 710
  24. 155
  25. 34
  26. 325
  27. 391
  28. 846
  29. 854
  30. 868
  31. 358
  32. 223
  33. 233
  34. 353
  35. 733
  36. 2
  37. 917
  38. 184
  39. 110
  40. 48

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