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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 295 · 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 train has 872 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  2. 2.A train has 735 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  3. 3.? + 472 = 931
  4. 4.716 + ? = 944
  5. 5.A school has 332 children. 176 of them are girls. How many boys are there?
  6. 6.484 − 364 =
  7. 7.986 − 379 =
  8. 8.A school has 228 children. 149 of them are girls. How many boys are there?
  9. 9.A school has 467 children. 124 of them are girls. How many boys are there?
  10. 10.A school has 807 children. 180 of them are girls. How many boys are there?
  11. 11.480 − 260 =
  12. 12.A train has 441 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  13. 13.A school has 772 children. 171 of them are girls. How many boys are there?
  14. 14.A train has 484 people in the front coaches and 232 people in the back coaches. How many people are on the train?
  15. 15.259 − 173 =
  16. 16.255 − 223 =
  17. 17.? − 192 = 438
  18. 18.563 + ? = 927
  19. 19.A train has 118 people in the front coaches and 564 people in the back coaches. How many people are on the train?
  20. 20.734 − ? = 502
  21. 21.639 − 550 =
  22. 22.A school has 220 children. 123 of them are girls. How many boys are there?
  23. 23.387 − ? = 264
  24. 24.A school has 327 children. 275 of them are girls. How many boys are there?
  25. 25.414 + 403 =
  26. 26.A school has 809 children. 441 of them are girls. How many boys are there?
  27. 27.749 + 213 =
  28. 28.943 − ? = 748
  29. 29.492 − 283 =
  30. 30.? − 409 = 185
  31. 31.494 − 209 =
  32. 32.? + 233 = 512
  33. 33.? + 840 = 978
  34. 34.A train has 705 people in the front coaches and 282 people in the back coaches. How many people are on the train?
  35. 35.? + 398 = 791
  36. 36.A train has 520 people in the front coaches and 321 people in the back coaches. How many people are on the train?
  37. 37.? + 139 = 760
  38. 38.? − 625 = 307
  39. 39.669 − ? = 220
  40. 40.A train has 203 people in the front coaches and 664 people in the back coaches. How many people are on the train?

Answer key

  1. 984
  2. 997
  3. 459
  4. 228
  5. 156
  6. 120
  7. 607
  8. 79
  9. 343
  10. 627
  11. 220
  12. 651
  13. 601
  14. 716
  15. 86
  16. 32
  17. 630
  18. 364
  19. 682
  20. 232
  21. 89
  22. 97
  23. 123
  24. 52
  25. 817
  26. 368
  27. 962
  28. 195
  29. 209
  30. 594
  31. 285
  32. 279
  33. 138
  34. 987
  35. 393
  36. 841
  37. 621
  38. 932
  39. 449
  40. 867

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