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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 572 · 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. 1.576 − ? = 218
  2. 2.246 + ? = 811
  3. 3.275 + 365 =
  4. 4.A school has 584 children. 547 of them are girls. How many boys are there?
  5. 5.322 + 180 =
  6. 6.495 + 464 =
  7. 7.451 − 240 =
  8. 8.981 − 332 =
  9. 9.580 − ? = 454
  10. 10.A train has 506 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  11. 11.264 − ? = 63
  12. 12.810 + 128 =
  13. 13.? − 158 = 136
  14. 14.823 + 120 =
  15. 15.A train has 233 people in the front coaches and 299 people in the back coaches. How many people are on the train?
  16. 16.448 + ? = 549
  17. 17.? − 890 = 15
  18. 18.516 + ? = 700
  19. 19.323 + 465 =
  20. 20.? − 335 = 367
  21. 21.642 − ? = 398
  22. 22.A train has 544 people in the front coaches and 362 people in the back coaches. How many people are on the train?
  23. 23.A school has 253 children. 141 of them are girls. How many boys are there?
  24. 24.? + 300 = 877
  25. 25.626 − 124 =
  26. 26.355 + ? = 885
  27. 27.A train has 787 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  28. 28.698 + 172 =
  29. 29.400 + ? = 799
  30. 30.A school has 853 children. 575 of them are girls. How many boys are there?
  31. 31.400 − ? = 137
  32. 32.A train has 545 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  33. 33.? − 751 = 108
  34. 34.646 + 207 =
  35. 35.821 + 177 =
  36. 36.638 − ? = 273
  37. 37.A school has 748 children. 187 of them are girls. How many boys are there?
  38. 38.433 + ? = 632
  39. 39.A school has 632 children. 140 of them are girls. How many boys are there?
  40. 40.333 + 254 =

Answer key

  1. 358
  2. 565
  3. 640
  4. 37
  5. 502
  6. 959
  7. 211
  8. 649
  9. 126
  10. 662
  11. 201
  12. 938
  13. 294
  14. 943
  15. 532
  16. 101
  17. 905
  18. 184
  19. 788
  20. 702
  21. 244
  22. 906
  23. 112
  24. 577
  25. 502
  26. 530
  27. 889
  28. 870
  29. 399
  30. 278
  31. 263
  32. 692
  33. 859
  34. 853
  35. 998
  36. 365
  37. 561
  38. 199
  39. 492
  40. 587

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