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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 641 · 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. 1.771 − ? = 109
  2. 2.333 + 621 =
  3. 3.A train has 305 people in the front coaches and 632 people in the back coaches. How many people are on the train?
  4. 4.A train has 506 people in the front coaches and 418 people in the back coaches. How many people are on the train?
  5. 5.396 + ? = 887
  6. 6.? + 285 = 818
  7. 7.? + 783 = 931
  8. 8.453 − 385 =
  9. 9.? − 738 = 154
  10. 10.380 + 151 =
  11. 11.221 − 219 =
  12. 12.A school has 496 children. 293 of them are girls. How many boys are there?
  13. 13.262 + ? = 722
  14. 14.523 + 201 =
  15. 15.926 − 130 =
  16. 16.A train has 708 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  17. 17.654 − 419 =
  18. 18.? − 312 = 52
  19. 19.441 + ? = 597
  20. 20.980 − ? = 389
  21. 21.197 + ? = 797
  22. 22.571 − 193 =
  23. 23.633 − 199 =
  24. 24.? + 339 = 545
  25. 25.A school has 219 children. 186 of them are girls. How many boys are there?
  26. 26.A school has 559 children. 397 of them are girls. How many boys are there?
  27. 27.? − 805 = 40
  28. 28.A school has 360 children. 148 of them are girls. How many boys are there?
  29. 29.A school has 392 children. 120 of them are girls. How many boys are there?
  30. 30.? + 863 = 974
  31. 31.321 − ? = 69
  32. 32.431 + 340 =
  33. 33.? − 199 = 185
  34. 34.608 − 371 =
  35. 35.A school has 384 children. 102 of them are girls. How many boys are there?
  36. 36.? + 278 = 431
  37. 37.A school has 832 children. 749 of them are girls. How many boys are there?
  38. 38.691 − 177 =
  39. 39.483 − 453 =
  40. 40.A train has 391 people in the front coaches and 396 people in the back coaches. How many people are on the train?

Answer key

  1. 662
  2. 954
  3. 937
  4. 924
  5. 491
  6. 533
  7. 148
  8. 68
  9. 892
  10. 531
  11. 2
  12. 203
  13. 460
  14. 724
  15. 796
  16. 859
  17. 235
  18. 364
  19. 156
  20. 591
  21. 600
  22. 378
  23. 434
  24. 206
  25. 33
  26. 162
  27. 845
  28. 212
  29. 272
  30. 111
  31. 252
  32. 771
  33. 384
  34. 237
  35. 282
  36. 153
  37. 83
  38. 514
  39. 30
  40. 787

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