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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 930 · 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 883 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  2. 2.A train has 259 people in the front coaches and 720 people in the back coaches. How many people are on the train?
  3. 3.A train has 497 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  4. 4.683 + ? = 784
  5. 5.? + 858 = 975
  6. 6.409 − 340 =
  7. 7.569 − 396 =
  8. 8.A school has 834 children. 496 of them are girls. How many boys are there?
  9. 9.A train has 735 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  10. 10.A school has 920 children. 237 of them are girls. How many boys are there?
  11. 11.122 + 511 =
  12. 12.? + 672 = 954
  13. 13.A school has 735 children. 151 of them are girls. How many boys are there?
  14. 14.A train has 456 people in the front coaches and 236 people in the back coaches. How many people are on the train?
  15. 15.A train has 886 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  16. 16.A school has 343 children. 272 of them are girls. How many boys are there?
  17. 17.584 + 348 =
  18. 18.268 + ? = 752
  19. 19.159 + 195 =
  20. 20.A train has 736 people in the front coaches and 176 people in the back coaches. How many people are on the train?
  21. 21.? + 236 = 861
  22. 22.A school has 972 children. 739 of them are girls. How many boys are there?
  23. 23.A train has 791 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  24. 24.589 − 343 =
  25. 25.A school has 905 children. 770 of them are girls. How many boys are there?
  26. 26.A train has 626 people in the front coaches and 232 people in the back coaches. How many people are on the train?
  27. 27.850 − ? = 243
  28. 28.A train has 751 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  29. 29.961 − 876 =
  30. 30.A school has 744 children. 727 of them are girls. How many boys are there?
  31. 31.231 − 163 =
  32. 32.A school has 718 children. 114 of them are girls. How many boys are there?
  33. 33.A school has 633 children. 234 of them are girls. How many boys are there?
  34. 34.307 + 107 =
  35. 35.A train has 710 people in the front coaches and 269 people in the back coaches. How many people are on the train?
  36. 36.440 − 217 =
  37. 37.A train has 534 people in the front coaches and 458 people in the back coaches. How many people are on the train?
  38. 38.? − 233 = 7
  39. 39.A train has 171 people in the front coaches and 825 people in the back coaches. How many people are on the train?
  40. 40.679 − 381 =

Answer key

  1. 983
  2. 979
  3. 807
  4. 101
  5. 117
  6. 69
  7. 173
  8. 338
  9. 870
  10. 683
  11. 633
  12. 282
  13. 584
  14. 692
  15. 989
  16. 71
  17. 932
  18. 484
  19. 354
  20. 912
  21. 625
  22. 233
  23. 958
  24. 246
  25. 135
  26. 858
  27. 607
  28. 960
  29. 85
  30. 17
  31. 68
  32. 604
  33. 399
  34. 414
  35. 979
  36. 223
  37. 992
  38. 240
  39. 996
  40. 298

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