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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 11 · 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. 1.634 − ? = 258
  2. 2.? + 623 = 736
  3. 3.380 + ? = 543
  4. 4.219 − ? = 37
  5. 5.A school has 224 children. 133 of them are girls. How many boys are there?
  6. 6.860 − ? = 435
  7. 7.856 + 112 =
  8. 8.154 + ? = 369
  9. 9.156 + ? = 652
  10. 10.? + 508 = 886
  11. 11.358 − 345 =
  12. 12.307 + 225 =
  13. 13.A school has 977 children. 184 of them are girls. How many boys are there?
  14. 14.488 − ? = 252
  15. 15.? + 668 = 778
  16. 16.164 + ? = 433
  17. 17.298 + ? = 594
  18. 18.? − 797 = 4
  19. 19.339 − ? = 11
  20. 20.610 − 127 =
  21. 21.A school has 864 children. 329 of them are girls. How many boys are there?
  22. 22.247 − 181 =
  23. 23.170 + ? = 363
  24. 24.212 − ? = 70
  25. 25.A train has 874 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  26. 26.387 + 209 =
  27. 27.807 − 523 =
  28. 28.895 − ? = 583
  29. 29.A school has 271 children. 182 of them are girls. How many boys are there?
  30. 30.123 + ? = 935
  31. 31.A train has 527 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  32. 32.A school has 534 children. 302 of them are girls. How many boys are there?
  33. 33.A school has 809 children. 338 of them are girls. How many boys are there?
  34. 34.321 + 346 =
  35. 35.A train has 409 people in the front coaches and 504 people in the back coaches. How many people are on the train?
  36. 36.A train has 217 people in the front coaches and 490 people in the back coaches. How many people are on the train?
  37. 37.? − 216 = 14
  38. 38.A school has 952 children. 443 of them are girls. How many boys are there?
  39. 39.294 − 265 =
  40. 40.A train has 161 people in the front coaches and 563 people in the back coaches. How many people are on the train?

Answer key

  1. 376
  2. 113
  3. 163
  4. 182
  5. 91
  6. 425
  7. 968
  8. 215
  9. 496
  10. 378
  11. 13
  12. 532
  13. 793
  14. 236
  15. 110
  16. 269
  17. 296
  18. 801
  19. 328
  20. 483
  21. 535
  22. 66
  23. 193
  24. 142
  25. 984
  26. 596
  27. 284
  28. 312
  29. 89
  30. 812
  31. 645
  32. 232
  33. 471
  34. 667
  35. 913
  36. 707
  37. 230
  38. 509
  39. 29
  40. 724

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