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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 672 · 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. 1.844 + 103 =
  2. 2.229 + ? = 548
  3. 3.523 + 108 =
  4. 4.705 − 220 =
  5. 5.A train has 897 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  6. 6.A school has 703 children. 567 of them are girls. How many boys are there?
  7. 7.207 − 113 =
  8. 8.794 − 694 =
  9. 9.730 − ? = 226
  10. 10.534 − 480 =
  11. 11.218 + 381 =
  12. 12.A train has 855 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  13. 13.647 + 157 =
  14. 14.A train has 653 people in the front coaches and 323 people in the back coaches. How many people are on the train?
  15. 15.668 − ? = 532
  16. 16.? + 407 = 950
  17. 17.A train has 373 people in the front coaches and 410 people in the back coaches. How many people are on the train?
  18. 18.281 + 616 =
  19. 19.684 + ? = 906
  20. 20.A school has 238 children. 145 of them are girls. How many boys are there?
  21. 21.832 + 103 =
  22. 22.? − 161 = 161
  23. 23.? − 284 = 47
  24. 24.310 + 644 =
  25. 25.A school has 352 children. 295 of them are girls. How many boys are there?
  26. 26.242 − 135 =
  27. 27.382 + 404 =
  28. 28.A train has 813 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  29. 29.163 + 269 =
  30. 30.254 + ? = 994
  31. 31.315 + 566 =
  32. 32.631 − ? = 398
  33. 33.? + 532 = 988
  34. 34.794 + 110 =
  35. 35.149 + 401 =
  36. 36.A train has 615 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  37. 37.277 − 162 =
  38. 38.A train has 144 people in the front coaches and 349 people in the back coaches. How many people are on the train?
  39. 39.177 + ? = 320
  40. 40.457 + 157 =

Answer key

  1. 947
  2. 319
  3. 631
  4. 485
  5. 998
  6. 136
  7. 94
  8. 100
  9. 504
  10. 54
  11. 599
  12. 963
  13. 804
  14. 976
  15. 136
  16. 543
  17. 783
  18. 897
  19. 222
  20. 93
  21. 935
  22. 322
  23. 331
  24. 954
  25. 57
  26. 107
  27. 786
  28. 939
  29. 432
  30. 740
  31. 881
  32. 233
  33. 456
  34. 904
  35. 550
  36. 771
  37. 115
  38. 493
  39. 143
  40. 614

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