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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 536 · 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. 1.388 − 231 =
  2. 2.521 − 474 =
  3. 3.? + 607 = 917
  4. 4.842 + 114 =
  5. 5.A school has 257 children. 129 of them are girls. How many boys are there?
  6. 6.A school has 431 children. 277 of them are girls. How many boys are there?
  7. 7.298 − ? = 196
  8. 8.927 − ? = 306
  9. 9.318 + ? = 502
  10. 10.164 + 155 =
  11. 11.166 + 574 =
  12. 12.? + 561 = 899
  13. 13.153 + ? = 584
  14. 14.A train has 285 people in the front coaches and 359 people in the back coaches. How many people are on the train?
  15. 15.438 + 517 =
  16. 16.? + 766 = 873
  17. 17.A train has 712 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  18. 18.600 + ? = 905
  19. 19.179 + 357 =
  20. 20.252 + 671 =
  21. 21.? − 331 = 2
  22. 22.790 − ? = 370
  23. 23.294 + 175 =
  24. 24.A train has 122 people in the front coaches and 852 people in the back coaches. How many people are on the train?
  25. 25.571 − 114 =
  26. 26.548 − 138 =
  27. 27.356 − 237 =
  28. 28.834 − 257 =
  29. 29.A school has 232 children. 169 of them are girls. How many boys are there?
  30. 30.A school has 537 children. 530 of them are girls. How many boys are there?
  31. 31.A school has 546 children. 146 of them are girls. How many boys are there?
  32. 32.969 − 655 =
  33. 33.348 + 343 =
  34. 34.? − 345 = 256
  35. 35.444 − 189 =
  36. 36.A train has 863 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  37. 37.A school has 958 children. 569 of them are girls. How many boys are there?
  38. 38.? + 837 = 969
  39. 39.309 − 193 =
  40. 40.611 + 143 =

Answer key

  1. 157
  2. 47
  3. 310
  4. 956
  5. 128
  6. 154
  7. 102
  8. 621
  9. 184
  10. 319
  11. 740
  12. 338
  13. 431
  14. 644
  15. 955
  16. 107
  17. 921
  18. 305
  19. 536
  20. 923
  21. 333
  22. 420
  23. 469
  24. 974
  25. 457
  26. 410
  27. 119
  28. 577
  29. 63
  30. 7
  31. 400
  32. 314
  33. 691
  34. 601
  35. 255
  36. 993
  37. 389
  38. 132
  39. 116
  40. 754

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