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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 597 · 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 835 children. 348 of them are girls. How many boys are there?
  2. 2.746 − 422 =
  3. 3.A train has 578 people in the front coaches and 404 people in the back coaches. How many people are on the train?
  4. 4.? + 304 = 422
  5. 5.887 + 108 =
  6. 6.405 − ? = 142
  7. 7.401 + 255 =
  8. 8.A train has 854 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  9. 9.305 + 230 =
  10. 10.565 − 182 =
  11. 11.A train has 354 people in the front coaches and 541 people in the back coaches. How many people are on the train?
  12. 12.A school has 718 children. 698 of them are girls. How many boys are there?
  13. 13.488 + 106 =
  14. 14.A train has 862 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  15. 15.A train has 517 people in the front coaches and 331 people in the back coaches. How many people are on the train?
  16. 16.? + 308 = 959
  17. 17.? + 613 = 961
  18. 18.? − 125 = 282
  19. 19.A train has 625 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  20. 20.730 + 144 =
  21. 21.562 + 212 =
  22. 22.? + 579 = 822
  23. 23.? − 196 = 116
  24. 24.A school has 243 children. 106 of them are girls. How many boys are there?
  25. 25.A train has 625 people in the front coaches and 336 people in the back coaches. How many people are on the train?
  26. 26.539 − ? = 187
  27. 27.A train has 596 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  28. 28.259 − 218 =
  29. 29.A school has 835 children. 456 of them are girls. How many boys are there?
  30. 30.A school has 745 children. 380 of them are girls. How many boys are there?
  31. 31.345 − 187 =
  32. 32.820 + ? = 941
  33. 33.? − 117 = 655
  34. 34.682 − 204 =
  35. 35.A train has 300 people in the front coaches and 340 people in the back coaches. How many people are on the train?
  36. 36.? + 183 = 691
  37. 37.A train has 663 people in the front coaches and 306 people in the back coaches. How many people are on the train?
  38. 38.647 − ? = 80
  39. 39.? + 109 = 238
  40. 40.A train has 751 people in the front coaches and 126 people in the back coaches. How many people are on the train?

Answer key

  1. 487
  2. 324
  3. 982
  4. 118
  5. 995
  6. 263
  7. 656
  8. 956
  9. 535
  10. 383
  11. 895
  12. 20
  13. 594
  14. 981
  15. 848
  16. 651
  17. 348
  18. 407
  19. 811
  20. 874
  21. 774
  22. 243
  23. 312
  24. 137
  25. 961
  26. 352
  27. 831
  28. 41
  29. 379
  30. 365
  31. 158
  32. 121
  33. 772
  34. 478
  35. 640
  36. 508
  37. 969
  38. 567
  39. 129
  40. 877

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