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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 94 · 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 368 people in the front coaches and 198 people in the back coaches. How many people are on the train?
  2. 2.? + 132 = 720
  3. 3.A school has 331 children. 194 of them are girls. How many boys are there?
  4. 4.A train has 485 people in the front coaches and 238 people in the back coaches. How many people are on the train?
  5. 5.153 + 694 =
  6. 6.790 + 169 =
  7. 7.A school has 856 children. 405 of them are girls. How many boys are there?
  8. 8.A train has 846 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  9. 9.148 + ? = 465
  10. 10.332 + 570 =
  11. 11.284 + 310 =
  12. 12.A train has 324 people in the front coaches and 643 people in the back coaches. How many people are on the train?
  13. 13.? − 243 = 140
  14. 14.875 + 100 =
  15. 15.852 − 548 =
  16. 16.394 + 478 =
  17. 17.A school has 225 children. 159 of them are girls. How many boys are there?
  18. 18.824 + ? = 924
  19. 19.316 + ? = 914
  20. 20.A school has 855 children. 157 of them are girls. How many boys are there?
  21. 21.134 + ? = 536
  22. 22.480 + 513 =
  23. 23.? + 492 = 693
  24. 24.454 − 111 =
  25. 25.? + 503 = 735
  26. 26.A train has 609 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  27. 27.A train has 809 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  28. 28.A school has 271 children. 105 of them are girls. How many boys are there?
  29. 29.640 − 108 =
  30. 30.458 + ? = 824
  31. 31.A school has 876 children. 232 of them are girls. How many boys are there?
  32. 32.? − 565 = 64
  33. 33.271 − 141 =
  34. 34.A train has 626 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  35. 35.109 + ? = 771
  36. 36.A train has 381 people in the front coaches and 564 people in the back coaches. How many people are on the train?
  37. 37.565 − 138 =
  38. 38.319 − 196 =
  39. 39.761 − ? = 346
  40. 40.? − 130 = 310

Answer key

  1. 566
  2. 588
  3. 137
  4. 723
  5. 847
  6. 959
  7. 451
  8. 998
  9. 317
  10. 902
  11. 594
  12. 967
  13. 383
  14. 975
  15. 304
  16. 872
  17. 66
  18. 100
  19. 598
  20. 698
  21. 402
  22. 993
  23. 201
  24. 343
  25. 232
  26. 750
  27. 958
  28. 166
  29. 532
  30. 366
  31. 644
  32. 629
  33. 130
  34. 803
  35. 662
  36. 945
  37. 427
  38. 123
  39. 415
  40. 440

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