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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 584 · 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 164 people in the front coaches and 387 people in the back coaches. How many people are on the train?
  2. 2.A train has 820 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  3. 3.720 + 273 =
  4. 4.318 + 591 =
  5. 5.202 − ? = 52
  6. 6.? − 264 = 627
  7. 7.386 + 144 =
  8. 8.A school has 580 children. 337 of them are girls. How many boys are there?
  9. 9.654 + ? = 895
  10. 10.A school has 559 children. 439 of them are girls. How many boys are there?
  11. 11.487 + ? = 664
  12. 12.A train has 843 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  13. 13.A train has 259 people in the front coaches and 183 people in the back coaches. How many people are on the train?
  14. 14.A school has 412 children. 171 of them are girls. How many boys are there?
  15. 15.A train has 108 people in the front coaches and 600 people in the back coaches. How many people are on the train?
  16. 16.690 − 623 =
  17. 17.A train has 161 people in the front coaches and 727 people in the back coaches. How many people are on the train?
  18. 18.352 + 335 =
  19. 19.346 − 103 =
  20. 20.632 − ? = 261
  21. 21.505 + ? = 983
  22. 22.960 − ? = 88
  23. 23.A school has 371 children. 104 of them are girls. How many boys are there?
  24. 24.A train has 653 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  25. 25.A train has 616 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  26. 26.567 − 462 =
  27. 27.236 + ? = 551
  28. 28.544 − 373 =
  29. 29.619 − 317 =
  30. 30.A school has 965 children. 602 of them are girls. How many boys are there?
  31. 31.775 + 183 =
  32. 32.620 − ? = 432
  33. 33.355 − 126 =
  34. 34.374 − 339 =
  35. 35.590 − ? = 136
  36. 36.466 + 391 =
  37. 37.? − 768 = 97
  38. 38.166 + 698 =
  39. 39.789 − ? = 237
  40. 40.A train has 434 people in the front coaches and 179 people in the back coaches. How many people are on the train?

Answer key

  1. 551
  2. 975
  3. 993
  4. 909
  5. 150
  6. 891
  7. 530
  8. 243
  9. 241
  10. 120
  11. 177
  12. 977
  13. 442
  14. 241
  15. 708
  16. 67
  17. 888
  18. 687
  19. 243
  20. 371
  21. 478
  22. 872
  23. 267
  24. 893
  25. 822
  26. 105
  27. 315
  28. 171
  29. 302
  30. 363
  31. 958
  32. 188
  33. 229
  34. 35
  35. 454
  36. 857
  37. 865
  38. 864
  39. 552
  40. 613

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