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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 275 · 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.A school has 584 children. 132 of them are girls. How many boys are there?
  2. 2.A train has 548 people in the front coaches and 199 people in the back coaches. How many people are on the train?
  3. 3.? + 240 = 884
  4. 4.372 + 133 =
  5. 5.700 − 126 =
  6. 6.455 + ? = 847
  7. 7.? + 186 = 357
  8. 8.A train has 269 people in the front coaches and 437 people in the back coaches. How many people are on the train?
  9. 9.A school has 647 children. 550 of them are girls. How many boys are there?
  10. 10.773 − 353 =
  11. 11.A school has 369 children. 297 of them are girls. How many boys are there?
  12. 12.861 − ? = 111
  13. 13.723 − 299 =
  14. 14.? − 704 = 59
  15. 15.624 + 272 =
  16. 16.A school has 772 children. 436 of them are girls. How many boys are there?
  17. 17.456 − ? = 208
  18. 18.A school has 859 children. 145 of them are girls. How many boys are there?
  19. 19.158 + ? = 476
  20. 20.333 + 422 =
  21. 21.? + 177 = 304
  22. 22.A train has 712 people in the front coaches and 275 people in the back coaches. How many people are on the train?
  23. 23.A school has 934 children. 930 of them are girls. How many boys are there?
  24. 24.536 + ? = 703
  25. 25.A school has 526 children. 265 of them are girls. How many boys are there?
  26. 26.? + 593 = 996
  27. 27.A train has 163 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  28. 28.610 + ? = 741
  29. 29.706 + 144 =
  30. 30.? − 113 = 223
  31. 31.667 − 507 =
  32. 32.A school has 483 children. 136 of them are girls. How many boys are there?
  33. 33.? + 647 = 784
  34. 34.? − 370 = 616
  35. 35.? + 116 = 945
  36. 36.A school has 285 children. 137 of them are girls. How many boys are there?
  37. 37.A train has 669 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  38. 38.? − 331 = 650
  39. 39.A school has 352 children. 314 of them are girls. How many boys are there?
  40. 40.488 − ? = 349

Answer key

  1. 452
  2. 747
  3. 644
  4. 505
  5. 574
  6. 392
  7. 171
  8. 706
  9. 97
  10. 420
  11. 72
  12. 750
  13. 424
  14. 763
  15. 896
  16. 336
  17. 248
  18. 714
  19. 318
  20. 755
  21. 127
  22. 987
  23. 4
  24. 167
  25. 261
  26. 403
  27. 281
  28. 131
  29. 850
  30. 336
  31. 160
  32. 347
  33. 137
  34. 986
  35. 829
  36. 148
  37. 826
  38. 981
  39. 38
  40. 139

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