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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 268 · 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 985 children. 555 of them are girls. How many boys are there?
  2. 2.372 − 302 =
  3. 3.865 + 131 =
  4. 4.426 − 294 =
  5. 5.575 + 195 =
  6. 6.515 − 236 =
  7. 7.A school has 562 children. 515 of them are girls. How many boys are there?
  8. 8.A train has 378 people in the front coaches and 307 people in the back coaches. How many people are on the train?
  9. 9.476 + ? = 885
  10. 10.A train has 199 people in the front coaches and 628 people in the back coaches. How many people are on the train?
  11. 11.A train has 499 people in the front coaches and 128 people in the back coaches. How many people are on the train?
  12. 12.A school has 664 children. 427 of them are girls. How many boys are there?
  13. 13.732 − 659 =
  14. 14.A school has 382 children. 254 of them are girls. How many boys are there?
  15. 15.? + 406 = 858
  16. 16.268 + 186 =
  17. 17.A school has 212 children. 113 of them are girls. How many boys are there?
  18. 18.A school has 343 children. 326 of them are girls. How many boys are there?
  19. 19.A school has 704 children. 222 of them are girls. How many boys are there?
  20. 20.A train has 124 people in the front coaches and 784 people in the back coaches. How many people are on the train?
  21. 21.248 − 158 =
  22. 22.A school has 438 children. 415 of them are girls. How many boys are there?
  23. 23.? − 521 = 121
  24. 24.545 − ? = 341
  25. 25.? − 364 = 592
  26. 26.800 − 174 =
  27. 27.A train has 461 people in the front coaches and 360 people in the back coaches. How many people are on the train?
  28. 28.A school has 401 children. 160 of them are girls. How many boys are there?
  29. 29.321 − ? = 219
  30. 30.A school has 759 children. 372 of them are girls. How many boys are there?
  31. 31.A train has 267 people in the front coaches and 244 people in the back coaches. How many people are on the train?
  32. 32.A train has 267 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  33. 33.622 + 102 =
  34. 34.A train has 660 people in the front coaches and 270 people in the back coaches. How many people are on the train?
  35. 35.? − 161 = 304
  36. 36.A school has 552 children. 300 of them are girls. How many boys are there?
  37. 37.868 − 149 =
  38. 38.239 − 145 =
  39. 39.255 − ? = 76
  40. 40.A school has 620 children. 576 of them are girls. How many boys are there?

Answer key

  1. 430
  2. 70
  3. 996
  4. 132
  5. 770
  6. 279
  7. 47
  8. 685
  9. 409
  10. 827
  11. 627
  12. 237
  13. 73
  14. 128
  15. 452
  16. 454
  17. 99
  18. 17
  19. 482
  20. 908
  21. 90
  22. 23
  23. 642
  24. 204
  25. 956
  26. 626
  27. 821
  28. 241
  29. 102
  30. 387
  31. 511
  32. 497
  33. 724
  34. 930
  35. 465
  36. 252
  37. 719
  38. 94
  39. 179
  40. 44

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