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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 515 · 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. 1.689 − 672 =
  2. 2.A train has 465 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  3. 3.647 + 328 =
  4. 4.507 + 474 =
  5. 5.A school has 378 children. 153 of them are girls. How many boys are there?
  6. 6.419 + ? = 706
  7. 7.438 + ? = 634
  8. 8.A train has 282 people in the front coaches and 672 people in the back coaches. How many people are on the train?
  9. 9.395 − ? = 217
  10. 10.A train has 198 people in the front coaches and 657 people in the back coaches. How many people are on the train?
  11. 11.? + 386 = 895
  12. 12.A school has 728 children. 529 of them are girls. How many boys are there?
  13. 13.752 + ? = 953
  14. 14.622 − 129 =
  15. 15.A train has 179 people in the front coaches and 468 people in the back coaches. How many people are on the train?
  16. 16.? + 384 = 642
  17. 17.A school has 282 children. 155 of them are girls. How many boys are there?
  18. 18.A train has 479 people in the front coaches and 487 people in the back coaches. How many people are on the train?
  19. 19.A school has 341 children. 116 of them are girls. How many boys are there?
  20. 20.629 + 221 =
  21. 21.856 + 128 =
  22. 22.265 − ? = 108
  23. 23.223 − ? = 86
  24. 24.217 − 186 =
  25. 25.A school has 723 children. 489 of them are girls. How many boys are there?
  26. 26.537 + ? = 833
  27. 27.530 − 441 =
  28. 28.A train has 675 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  29. 29.133 + ? = 527
  30. 30.A school has 823 children. 157 of them are girls. How many boys are there?
  31. 31.? − 121 = 205
  32. 32.148 + ? = 977
  33. 33.663 + ? = 917
  34. 34.? − 457 = 310
  35. 35.384 + 240 =
  36. 36.A train has 418 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  37. 37.A train has 310 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  38. 38.? + 612 = 873
  39. 39.A school has 911 children. 648 of them are girls. How many boys are there?
  40. 40.A train has 776 people in the front coaches and 120 people in the back coaches. How many people are on the train?

Answer key

  1. 17
  2. 644
  3. 975
  4. 981
  5. 225
  6. 287
  7. 196
  8. 954
  9. 178
  10. 855
  11. 509
  12. 199
  13. 201
  14. 493
  15. 647
  16. 258
  17. 127
  18. 966
  19. 225
  20. 850
  21. 984
  22. 157
  23. 137
  24. 31
  25. 234
  26. 296
  27. 89
  28. 999
  29. 394
  30. 666
  31. 326
  32. 829
  33. 254
  34. 767
  35. 624
  36. 649
  37. 469
  38. 261
  39. 263
  40. 896

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