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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 776 · 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. 1.220 + 716 =
  2. 2.A train has 230 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  3. 3.159 + ? = 895
  4. 4.703 + ? = 861
  5. 5.A school has 241 children. 117 of them are girls. How many boys are there?
  6. 6.931 − 490 =
  7. 7.A train has 791 people in the front coaches and 176 people in the back coaches. How many people are on the train?
  8. 8.120 + 437 =
  9. 9.623 + ? = 760
  10. 10.? − 409 = 572
  11. 11.445 − 146 =
  12. 12.455 − 435 =
  13. 13.A train has 146 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  14. 14.? − 419 = 133
  15. 15.? + 540 = 681
  16. 16.A train has 304 people in the front coaches and 567 people in the back coaches. How many people are on the train?
  17. 17.452 + 108 =
  18. 18.A school has 463 children. 365 of them are girls. How many boys are there?
  19. 19.219 − 133 =
  20. 20.729 + 134 =
  21. 21.986 − ? = 764
  22. 22.305 + ? = 426
  23. 23.773 − 339 =
  24. 24.A school has 991 children. 546 of them are girls. How many boys are there?
  25. 25.645 − ? = 124
  26. 26.A train has 280 people in the front coaches and 401 people in the back coaches. How many people are on the train?
  27. 27.? − 725 = 148
  28. 28.A train has 693 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  29. 29.A school has 707 children. 183 of them are girls. How many boys are there?
  30. 30.? − 139 = 856
  31. 31.270 − 177 =
  32. 32.A train has 281 people in the front coaches and 245 people in the back coaches. How many people are on the train?
  33. 33.681 − 494 =
  34. 34.? + 744 = 876
  35. 35.680 + ? = 907
  36. 36.A train has 320 people in the front coaches and 237 people in the back coaches. How many people are on the train?
  37. 37.686 − 492 =
  38. 38.325 − ? = 177
  39. 39.649 + ? = 918
  40. 40.360 − ? = 30

Answer key

  1. 936
  2. 498
  3. 736
  4. 158
  5. 124
  6. 441
  7. 967
  8. 557
  9. 137
  10. 981
  11. 299
  12. 20
  13. 295
  14. 552
  15. 141
  16. 871
  17. 560
  18. 98
  19. 86
  20. 863
  21. 222
  22. 121
  23. 434
  24. 445
  25. 521
  26. 681
  27. 873
  28. 807
  29. 524
  30. 995
  31. 93
  32. 526
  33. 187
  34. 132
  35. 227
  36. 557
  37. 194
  38. 148
  39. 269
  40. 330

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