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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 592 · 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 691 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  2. 2.A school has 240 children. 173 of them are girls. How many boys are there?
  3. 3.963 − 520 =
  4. 4.272 + 501 =
  5. 5.618 − ? = 358
  6. 6.? − 195 = 350
  7. 7.178 + ? = 836
  8. 8.243 − 238 =
  9. 9.A school has 710 children. 101 of them are girls. How many boys are there?
  10. 10.673 + ? = 806
  11. 11.703 − ? = 183
  12. 12.546 − 276 =
  13. 13.? + 291 = 482
  14. 14.A train has 500 people in the front coaches and 426 people in the back coaches. How many people are on the train?
  15. 15.654 − ? = 433
  16. 16.? + 852 = 962
  17. 17.413 + 543 =
  18. 18.771 + 156 =
  19. 19.685 + 256 =
  20. 20.A school has 583 children. 320 of them are girls. How many boys are there?
  21. 21.293 + ? = 980
  22. 22.? + 604 = 815
  23. 23.? − 731 = 240
  24. 24.249 + 112 =
  25. 25.A school has 944 children. 237 of them are girls. How many boys are there?
  26. 26.? + 109 = 237
  27. 27.579 − 105 =
  28. 28.A school has 746 children. 550 of them are girls. How many boys are there?
  29. 29.298 − 211 =
  30. 30.A train has 453 people in the front coaches and 302 people in the back coaches. How many people are on the train?
  31. 31.A school has 649 children. 253 of them are girls. How many boys are there?
  32. 32.236 + 409 =
  33. 33.924 − 358 =
  34. 34.A train has 118 people in the front coaches and 750 people in the back coaches. How many people are on the train?
  35. 35.544 − 336 =
  36. 36.472 + ? = 932
  37. 37.A train has 587 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  38. 38.A school has 982 children. 836 of them are girls. How many boys are there?
  39. 39.110 + 802 =
  40. 40.752 − 636 =

Answer key

  1. 878
  2. 67
  3. 443
  4. 773
  5. 260
  6. 545
  7. 658
  8. 5
  9. 609
  10. 133
  11. 520
  12. 270
  13. 191
  14. 926
  15. 221
  16. 110
  17. 956
  18. 927
  19. 941
  20. 263
  21. 687
  22. 211
  23. 971
  24. 361
  25. 707
  26. 128
  27. 474
  28. 196
  29. 87
  30. 755
  31. 396
  32. 645
  33. 566
  34. 868
  35. 208
  36. 460
  37. 701
  38. 146
  39. 912
  40. 116

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