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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 176 · 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. 1.686 + 113 =
  2. 2.532 − 373 =
  3. 3.392 + 266 =
  4. 4.491 + 113 =
  5. 5.A school has 679 children. 370 of them are girls. How many boys are there?
  6. 6.A school has 682 children. 639 of them are girls. How many boys are there?
  7. 7.A school has 456 children. 427 of them are girls. How many boys are there?
  8. 8.571 − ? = 348
  9. 9.? + 749 = 886
  10. 10.137 + ? = 657
  11. 11.645 + ? = 814
  12. 12.835 − 651 =
  13. 13.A train has 439 people in the front coaches and 436 people in the back coaches. How many people are on the train?
  14. 14.A train has 765 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  15. 15.794 − 673 =
  16. 16.A train has 401 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  17. 17.505 − 150 =
  18. 18.A school has 338 children. 126 of them are girls. How many boys are there?
  19. 19.722 + 127 =
  20. 20.? + 214 = 483
  21. 21.706 + 199 =
  22. 22.920 − ? = 636
  23. 23.A school has 944 children. 405 of them are girls. How many boys are there?
  24. 24.462 + 282 =
  25. 25.A school has 267 children. 219 of them are girls. How many boys are there?
  26. 26.553 + ? = 696
  27. 27.A school has 546 children. 132 of them are girls. How many boys are there?
  28. 28.380 + ? = 807
  29. 29.A school has 587 children. 429 of them are girls. How many boys are there?
  30. 30.A school has 811 children. 206 of them are girls. How many boys are there?
  31. 31.502 − 278 =
  32. 32.? + 119 = 709
  33. 33.A train has 468 people in the front coaches and 449 people in the back coaches. How many people are on the train?
  34. 34.A train has 712 people in the front coaches and 169 people in the back coaches. How many people are on the train?
  35. 35.106 + 131 =
  36. 36.298 − 228 =
  37. 37.? − 266 = 349
  38. 38.A school has 900 children. 205 of them are girls. How many boys are there?
  39. 39.? + 221 = 529
  40. 40.A train has 735 people in the front coaches and 255 people in the back coaches. How many people are on the train?

Answer key

  1. 799
  2. 159
  3. 658
  4. 604
  5. 309
  6. 43
  7. 29
  8. 223
  9. 137
  10. 520
  11. 169
  12. 184
  13. 875
  14. 897
  15. 121
  16. 539
  17. 355
  18. 212
  19. 849
  20. 269
  21. 905
  22. 284
  23. 539
  24. 744
  25. 48
  26. 143
  27. 414
  28. 427
  29. 158
  30. 605
  31. 224
  32. 590
  33. 917
  34. 881
  35. 237
  36. 70
  37. 615
  38. 695
  39. 308
  40. 990

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