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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 233 · 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.? + 844 = 963
  2. 2.? + 813 = 955
  3. 3.A school has 945 children. 161 of them are girls. How many boys are there?
  4. 4.238 − 228 =
  5. 5.A train has 208 people in the front coaches and 649 people in the back coaches. How many people are on the train?
  6. 6.? + 825 = 933
  7. 7.288 − 192 =
  8. 8.791 + 207 =
  9. 9.594 − ? = 415
  10. 10.A train has 332 people in the front coaches and 383 people in the back coaches. How many people are on the train?
  11. 11.260 + ? = 638
  12. 12.630 − ? = 19
  13. 13.975 − 305 =
  14. 14.? − 356 = 34
  15. 15.679 − ? = 163
  16. 16.? + 123 = 303
  17. 17.325 + 151 =
  18. 18.537 + ? = 961
  19. 19.A train has 365 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  20. 20.312 + 511 =
  21. 21.473 − 100 =
  22. 22.A school has 229 children. 126 of them are girls. How many boys are there?
  23. 23.201 + ? = 383
  24. 24.? − 175 = 448
  25. 25.A train has 199 people in the front coaches and 410 people in the back coaches. How many people are on the train?
  26. 26.316 + 405 =
  27. 27.418 + 333 =
  28. 28.A school has 850 children. 263 of them are girls. How many boys are there?
  29. 29.697 − 657 =
  30. 30.534 − 302 =
  31. 31.678 − ? = 305
  32. 32.A train has 129 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  33. 33.A train has 738 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  34. 34.859 − ? = 580
  35. 35.A school has 629 children. 441 of them are girls. How many boys are there?
  36. 36.A school has 287 children. 133 of them are girls. How many boys are there?
  37. 37.A school has 836 children. 243 of them are girls. How many boys are there?
  38. 38.A school has 934 children. 275 of them are girls. How many boys are there?
  39. 39.475 + ? = 667
  40. 40.A school has 687 children. 418 of them are girls. How many boys are there?

Answer key

  1. 119
  2. 142
  3. 784
  4. 10
  5. 857
  6. 108
  7. 96
  8. 998
  9. 179
  10. 715
  11. 378
  12. 611
  13. 670
  14. 390
  15. 516
  16. 180
  17. 476
  18. 424
  19. 546
  20. 823
  21. 373
  22. 103
  23. 182
  24. 623
  25. 609
  26. 721
  27. 751
  28. 587
  29. 40
  30. 232
  31. 373
  32. 360
  33. 928
  34. 279
  35. 188
  36. 154
  37. 593
  38. 659
  39. 192
  40. 269

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