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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 941 · 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. 1.764 + ? = 927
  2. 2.873 − 199 =
  3. 3.A school has 450 children. 432 of them are girls. How many boys are there?
  4. 4.257 + 196 =
  5. 5.586 − ? = 362
  6. 6.A school has 270 children. 143 of them are girls. How many boys are there?
  7. 7.A school has 362 children. 241 of them are girls. How many boys are there?
  8. 8.216 − 102 =
  9. 9.? + 147 = 593
  10. 10.A school has 699 children. 667 of them are girls. How many boys are there?
  11. 11.975 − ? = 712
  12. 12.A school has 400 children. 334 of them are girls. How many boys are there?
  13. 13.814 − 807 =
  14. 14.A train has 633 people in the front coaches and 252 people in the back coaches. How many people are on the train?
  15. 15.? + 778 = 986
  16. 16.248 − 160 =
  17. 17.A school has 344 children. 193 of them are girls. How many boys are there?
  18. 18.? − 126 = 107
  19. 19.? − 408 = 466
  20. 20.A train has 386 people in the front coaches and 373 people in the back coaches. How many people are on the train?
  21. 21.A train has 489 people in the front coaches and 460 people in the back coaches. How many people are on the train?
  22. 22.147 + 295 =
  23. 23.A train has 394 people in the front coaches and 377 people in the back coaches. How many people are on the train?
  24. 24.A train has 507 people in the front coaches and 223 people in the back coaches. How many people are on the train?
  25. 25.? + 544 = 704
  26. 26.926 − 465 =
  27. 27.A train has 153 people in the front coaches and 777 people in the back coaches. How many people are on the train?
  28. 28.? + 691 = 803
  29. 29.A school has 227 children. 146 of them are girls. How many boys are there?
  30. 30.319 − 294 =
  31. 31.156 + 696 =
  32. 32.? − 176 = 246
  33. 33.731 − 508 =
  34. 34.A school has 555 children. 285 of them are girls. How many boys are there?
  35. 35.A school has 609 children. 297 of them are girls. How many boys are there?
  36. 36.A school has 350 children. 234 of them are girls. How many boys are there?
  37. 37.351 − ? = 134
  38. 38.A train has 747 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  39. 39.A school has 910 children. 556 of them are girls. How many boys are there?
  40. 40.412 + 175 =

Answer key

  1. 163
  2. 674
  3. 18
  4. 453
  5. 224
  6. 127
  7. 121
  8. 114
  9. 446
  10. 32
  11. 263
  12. 66
  13. 7
  14. 885
  15. 208
  16. 88
  17. 151
  18. 233
  19. 874
  20. 759
  21. 949
  22. 442
  23. 771
  24. 730
  25. 160
  26. 461
  27. 930
  28. 112
  29. 81
  30. 25
  31. 852
  32. 422
  33. 223
  34. 270
  35. 312
  36. 116
  37. 217
  38. 894
  39. 354
  40. 587

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