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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 942 · 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.? + 775 = 908
  2. 2.382 − 322 =
  3. 3.831 − 537 =
  4. 4.A train has 703 people in the front coaches and 281 people in the back coaches. How many people are on the train?
  5. 5.606 − 553 =
  6. 6.535 − ? = 429
  7. 7.A train has 146 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  8. 8.A train has 675 people in the front coaches and 237 people in the back coaches. How many people are on the train?
  9. 9.? + 416 = 901
  10. 10.673 − ? = 513
  11. 11.494 − 155 =
  12. 12.323 + ? = 861
  13. 13.694 − 159 =
  14. 14.A train has 878 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  15. 15.411 + ? = 879
  16. 16.667 + 190 =
  17. 17.A school has 494 children. 216 of them are girls. How many boys are there?
  18. 18.? + 118 = 452
  19. 19.A train has 829 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  20. 20.A school has 582 children. 130 of them are girls. How many boys are there?
  21. 21.595 + 342 =
  22. 22.472 + 179 =
  23. 23.564 + 419 =
  24. 24.A train has 885 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  25. 25.A school has 314 children. 130 of them are girls. How many boys are there?
  26. 26.515 − 312 =
  27. 27.? + 558 = 730
  28. 28.? + 592 = 709
  29. 29.A train has 548 people in the front coaches and 269 people in the back coaches. How many people are on the train?
  30. 30.416 − 270 =
  31. 31.A train has 511 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  32. 32.A school has 634 children. 421 of them are girls. How many boys are there?
  33. 33.A school has 206 children. 184 of them are girls. How many boys are there?
  34. 34.A school has 317 children. 115 of them are girls. How many boys are there?
  35. 35.A school has 370 children. 346 of them are girls. How many boys are there?
  36. 36.858 − 495 =
  37. 37.A school has 333 children. 233 of them are girls. How many boys are there?
  38. 38.A train has 417 people in the front coaches and 269 people in the back coaches. How many people are on the train?
  39. 39.? + 351 = 635
  40. 40.558 − ? = 399

Answer key

  1. 133
  2. 60
  3. 294
  4. 984
  5. 53
  6. 106
  7. 266
  8. 912
  9. 485
  10. 160
  11. 339
  12. 538
  13. 535
  14. 978
  15. 468
  16. 857
  17. 278
  18. 334
  19. 983
  20. 452
  21. 937
  22. 651
  23. 983
  24. 999
  25. 184
  26. 203
  27. 172
  28. 117
  29. 817
  30. 146
  31. 846
  32. 213
  33. 22
  34. 202
  35. 24
  36. 363
  37. 100
  38. 686
  39. 284
  40. 159

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