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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 152 · 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 718 people in the front coaches and 169 people in the back coaches. How many people are on the train?
  2. 2.300 − 208 =
  3. 3.A school has 615 children. 147 of them are girls. How many boys are there?
  4. 4.680 − 289 =
  5. 5.599 + ? = 706
  6. 6.968 − 901 =
  7. 7.152 + ? = 410
  8. 8.771 − 187 =
  9. 9.A train has 414 people in the front coaches and 368 people in the back coaches. How many people are on the train?
  10. 10.817 − 294 =
  11. 11.A train has 327 people in the front coaches and 544 people in the back coaches. How many people are on the train?
  12. 12.498 + 153 =
  13. 13.? − 558 = 321
  14. 14.? − 797 = 145
  15. 15.288 − 213 =
  16. 16.A school has 465 children. 302 of them are girls. How many boys are there?
  17. 17.301 + ? = 577
  18. 18.? + 473 = 920
  19. 19.? − 215 = 537
  20. 20.A school has 895 children. 401 of them are girls. How many boys are there?
  21. 21.? − 179 = 494
  22. 22.A school has 283 children. 219 of them are girls. How many boys are there?
  23. 23.A train has 206 people in the front coaches and 662 people in the back coaches. How many people are on the train?
  24. 24.231 − 221 =
  25. 25.? − 110 = 469
  26. 26.624 − ? = 135
  27. 27.471 − 426 =
  28. 28.109 + ? = 267
  29. 29.A train has 836 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  30. 30.A train has 446 people in the front coaches and 544 people in the back coaches. How many people are on the train?
  31. 31.A school has 418 children. 151 of them are girls. How many boys are there?
  32. 32.A school has 502 children. 177 of them are girls. How many boys are there?
  33. 33.A train has 847 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  34. 34.442 + 423 =
  35. 35.301 − 136 =
  36. 36.A train has 894 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  37. 37.? + 623 = 778
  38. 38.? − 198 = 32
  39. 39.692 − ? = 523
  40. 40.664 − 540 =

Answer key

  1. 887
  2. 92
  3. 468
  4. 391
  5. 107
  6. 67
  7. 258
  8. 584
  9. 782
  10. 523
  11. 871
  12. 651
  13. 879
  14. 942
  15. 75
  16. 163
  17. 276
  18. 447
  19. 752
  20. 494
  21. 673
  22. 64
  23. 868
  24. 10
  25. 579
  26. 489
  27. 45
  28. 158
  29. 970
  30. 990
  31. 267
  32. 325
  33. 970
  34. 865
  35. 165
  36. 999
  37. 155
  38. 230
  39. 169
  40. 124

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