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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 215 · 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. 1.877 − ? = 14
  2. 2.968 − 732 =
  3. 3.A school has 256 children. 126 of them are girls. How many boys are there?
  4. 4.863 − ? = 714
  5. 5.195 + ? = 484
  6. 6.305 − 220 =
  7. 7.A school has 713 children. 225 of them are girls. How many boys are there?
  8. 8.395 − 143 =
  9. 9.562 + 154 =
  10. 10.111 + 215 =
  11. 11.291 − ? = 88
  12. 12.? − 156 = 566
  13. 13.547 − ? = 199
  14. 14.A school has 724 children. 416 of them are girls. How many boys are there?
  15. 15.A school has 383 children. 227 of them are girls. How many boys are there?
  16. 16.658 + 122 =
  17. 17.795 − 254 =
  18. 18.? + 382 = 824
  19. 19.A school has 323 children. 135 of them are girls. How many boys are there?
  20. 20.335 − 239 =
  21. 21.399 + ? = 902
  22. 22.256 + 141 =
  23. 23.279 − 119 =
  24. 24.A train has 442 people in the front coaches and 445 people in the back coaches. How many people are on the train?
  25. 25.A train has 190 people in the front coaches and 605 people in the back coaches. How many people are on the train?
  26. 26.A school has 419 children. 199 of them are girls. How many boys are there?
  27. 27.790 + 188 =
  28. 28.A school has 939 children. 367 of them are girls. How many boys are there?
  29. 29.A train has 725 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  30. 30.A train has 724 people in the front coaches and 260 people in the back coaches. How many people are on the train?
  31. 31.311 + 220 =
  32. 32.139 + ? = 737
  33. 33.912 − ? = 363
  34. 34.475 + ? = 792
  35. 35.A school has 887 children. 601 of them are girls. How many boys are there?
  36. 36.A school has 753 children. 310 of them are girls. How many boys are there?
  37. 37.388 − ? = 203
  38. 38.A school has 674 children. 201 of them are girls. How many boys are there?
  39. 39.? + 136 = 238
  40. 40.A school has 303 children. 244 of them are girls. How many boys are there?

Answer key

  1. 863
  2. 236
  3. 130
  4. 149
  5. 289
  6. 85
  7. 488
  8. 252
  9. 716
  10. 326
  11. 203
  12. 722
  13. 348
  14. 308
  15. 156
  16. 780
  17. 541
  18. 442
  19. 188
  20. 96
  21. 503
  22. 397
  23. 160
  24. 887
  25. 795
  26. 220
  27. 978
  28. 572
  29. 921
  30. 984
  31. 531
  32. 598
  33. 549
  34. 317
  35. 286
  36. 443
  37. 185
  38. 473
  39. 102
  40. 59

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