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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 117 · 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 990 children. 498 of them are girls. How many boys are there?
  2. 2.A train has 380 people in the front coaches and 553 people in the back coaches. How many people are on the train?
  3. 3.A school has 449 children. 312 of them are girls. How many boys are there?
  4. 4.296 + 107 =
  5. 5.A train has 176 people in the front coaches and 576 people in the back coaches. How many people are on the train?
  6. 6.A school has 563 children. 398 of them are girls. How many boys are there?
  7. 7.709 + ? = 876
  8. 8.654 − 401 =
  9. 9.? + 634 = 845
  10. 10.257 − 240 =
  11. 11.792 + 166 =
  12. 12.? − 274 = 298
  13. 13.A train has 471 people in the front coaches and 475 people in the back coaches. How many people are on the train?
  14. 14.743 − ? = 426
  15. 15.836 − 556 =
  16. 16.460 + 166 =
  17. 17.799 + 190 =
  18. 18.A train has 864 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  19. 19.352 − ? = 148
  20. 20.? − 325 = 213
  21. 21.436 − 142 =
  22. 22.? + 426 = 778
  23. 23.105 + ? = 214
  24. 24.270 − 207 =
  25. 25.896 − 234 =
  26. 26.255 − ? = 140
  27. 27.716 − ? = 555
  28. 28.A school has 283 children. 262 of them are girls. How many boys are there?
  29. 29.573 + ? = 898
  30. 30.A train has 491 people in the front coaches and 253 people in the back coaches. How many people are on the train?
  31. 31.A school has 469 children. 299 of them are girls. How many boys are there?
  32. 32.A school has 240 children. 224 of them are girls. How many boys are there?
  33. 33.451 + 140 =
  34. 34.290 − 229 =
  35. 35.657 + ? = 781
  36. 36.A school has 212 children. 130 of them are girls. How many boys are there?
  37. 37.A school has 595 children. 239 of them are girls. How many boys are there?
  38. 38.A school has 429 children. 271 of them are girls. How many boys are there?
  39. 39.? + 213 = 383
  40. 40.? − 159 = 199

Answer key

  1. 492
  2. 933
  3. 137
  4. 403
  5. 752
  6. 165
  7. 167
  8. 253
  9. 211
  10. 17
  11. 958
  12. 572
  13. 946
  14. 317
  15. 280
  16. 626
  17. 989
  18. 972
  19. 204
  20. 538
  21. 294
  22. 352
  23. 109
  24. 63
  25. 662
  26. 115
  27. 161
  28. 21
  29. 325
  30. 744
  31. 170
  32. 16
  33. 591
  34. 61
  35. 124
  36. 82
  37. 356
  38. 158
  39. 170
  40. 358

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