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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 445 · 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 671 children. 477 of them are girls. How many boys are there?
  2. 2.A school has 794 children. 625 of them are girls. How many boys are there?
  3. 3.259 − 159 =
  4. 4.253 − ? = 103
  5. 5.326 + 174 =
  6. 6.530 + 122 =
  7. 7.414 + 106 =
  8. 8.625 + 292 =
  9. 9.202 + 714 =
  10. 10.554 + 190 =
  11. 11.223 − ? = 75
  12. 12.468 + ? = 576
  13. 13.497 − ? = 50
  14. 14.A train has 784 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  15. 15.359 + 254 =
  16. 16.? − 207 = 209
  17. 17.A school has 819 children. 278 of them are girls. How many boys are there?
  18. 18.A school has 648 children. 484 of them are girls. How many boys are there?
  19. 19.927 − 408 =
  20. 20.883 − ? = 63
  21. 21.A train has 696 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  22. 22.? − 261 = 32
  23. 23.607 + 357 =
  24. 24.661 − 215 =
  25. 25.736 − 243 =
  26. 26.A school has 326 children. 161 of them are girls. How many boys are there?
  27. 27.498 + 420 =
  28. 28.508 + 169 =
  29. 29.524 − 450 =
  30. 30.A school has 632 children. 106 of them are girls. How many boys are there?
  31. 31.222 + ? = 918
  32. 32.A train has 740 people in the front coaches and 237 people in the back coaches. How many people are on the train?
  33. 33.A school has 405 children. 196 of them are girls. How many boys are there?
  34. 34.A school has 759 children. 616 of them are girls. How many boys are there?
  35. 35.852 − 244 =
  36. 36.? − 119 = 237
  37. 37.321 − 279 =
  38. 38.A school has 526 children. 468 of them are girls. How many boys are there?
  39. 39.? + 817 = 938
  40. 40.227 + 142 =

Answer key

  1. 194
  2. 169
  3. 100
  4. 150
  5. 500
  6. 652
  7. 520
  8. 917
  9. 916
  10. 744
  11. 148
  12. 108
  13. 447
  14. 939
  15. 613
  16. 416
  17. 541
  18. 164
  19. 519
  20. 820
  21. 887
  22. 293
  23. 964
  24. 446
  25. 493
  26. 165
  27. 918
  28. 677
  29. 74
  30. 526
  31. 696
  32. 977
  33. 209
  34. 143
  35. 608
  36. 356
  37. 42
  38. 58
  39. 121
  40. 369

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