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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 689 · 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. 1.444 + 481 =
  2. 2.109 + ? = 833
  3. 3.600 + 316 =
  4. 4.A train has 332 people in the front coaches and 458 people in the back coaches. How many people are on the train?
  5. 5.? + 721 = 994
  6. 6.A train has 295 people in the front coaches and 526 people in the back coaches. How many people are on the train?
  7. 7.A school has 588 children. 256 of them are girls. How many boys are there?
  8. 8.? − 134 = 498
  9. 9.A train has 485 people in the front coaches and 290 people in the back coaches. How many people are on the train?
  10. 10.450 − 440 =
  11. 11.A school has 201 children. 107 of them are girls. How many boys are there?
  12. 12.A school has 200 children. 121 of them are girls. How many boys are there?
  13. 13.A train has 564 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  14. 14.461 − 246 =
  15. 15.A train has 468 people in the front coaches and 342 people in the back coaches. How many people are on the train?
  16. 16.A school has 547 children. 167 of them are girls. How many boys are there?
  17. 17.A train has 618 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  18. 18.A school has 289 children. 160 of them are girls. How many boys are there?
  19. 19.? + 229 = 736
  20. 20.A train has 443 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  21. 21.887 − 799 =
  22. 22.695 − 207 =
  23. 23.223 + ? = 697
  24. 24.173 + ? = 481
  25. 25.? − 612 = 247
  26. 26.A school has 304 children. 222 of them are girls. How many boys are there?
  27. 27.126 + ? = 670
  28. 28.753 − 357 =
  29. 29.294 + ? = 586
  30. 30.640 + ? = 999
  31. 31.A school has 948 children. 838 of them are girls. How many boys are there?
  32. 32.177 + 246 =
  33. 33.405 + 242 =
  34. 34.140 + 311 =
  35. 35.281 + 345 =
  36. 36.? − 197 = 256
  37. 37.? − 716 = 42
  38. 38.? + 450 = 778
  39. 39.710 − ? = 570
  40. 40.228 + 204 =

Answer key

  1. 925
  2. 724
  3. 916
  4. 790
  5. 273
  6. 821
  7. 332
  8. 632
  9. 775
  10. 10
  11. 94
  12. 79
  13. 738
  14. 215
  15. 810
  16. 380
  17. 774
  18. 129
  19. 507
  20. 553
  21. 88
  22. 488
  23. 474
  24. 308
  25. 859
  26. 82
  27. 544
  28. 396
  29. 292
  30. 359
  31. 110
  32. 423
  33. 647
  34. 451
  35. 626
  36. 453
  37. 758
  38. 328
  39. 140
  40. 432

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