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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 789 · 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. 1.285 − 130 =
  2. 2.A train has 792 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  3. 3.A school has 441 children. 279 of them are girls. How many boys are there?
  4. 4.A school has 936 children. 428 of them are girls. How many boys are there?
  5. 5.A train has 285 people in the front coaches and 432 people in the back coaches. How many people are on the train?
  6. 6.632 + 325 =
  7. 7.A school has 804 children. 796 of them are girls. How many boys are there?
  8. 8.867 + 124 =
  9. 9.565 − 456 =
  10. 10.433 − ? = 126
  11. 11.724 − ? = 172
  12. 12.236 − 163 =
  13. 13.740 + 126 =
  14. 14.648 + 294 =
  15. 15.592 − 345 =
  16. 16.A train has 447 people in the front coaches and 331 people in the back coaches. How many people are on the train?
  17. 17.A school has 539 children. 351 of them are girls. How many boys are there?
  18. 18.767 + ? = 942
  19. 19.679 + ? = 863
  20. 20.A school has 757 children. 172 of them are girls. How many boys are there?
  21. 21.A train has 312 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  22. 22.A school has 605 children. 453 of them are girls. How many boys are there?
  23. 23.412 − ? = 232
  24. 24.A train has 257 people in the front coaches and 674 people in the back coaches. How many people are on the train?
  25. 25.287 + 459 =
  26. 26.? − 381 = 10
  27. 27.A school has 962 children. 599 of them are girls. How many boys are there?
  28. 28.309 − 220 =
  29. 29.415 − 190 =
  30. 30.A school has 606 children. 489 of them are girls. How many boys are there?
  31. 31.915 − 533 =
  32. 32.A school has 533 children. 422 of them are girls. How many boys are there?
  33. 33.651 + ? = 752
  34. 34.A school has 964 children. 621 of them are girls. How many boys are there?
  35. 35.? + 780 = 925
  36. 36.A train has 331 people in the front coaches and 482 people in the back coaches. How many people are on the train?
  37. 37.865 + 111 =
  38. 38.851 − 192 =
  39. 39.706 + ? = 817
  40. 40.? − 189 = 333

Answer key

  1. 155
  2. 983
  3. 162
  4. 508
  5. 717
  6. 957
  7. 8
  8. 991
  9. 109
  10. 307
  11. 552
  12. 73
  13. 866
  14. 942
  15. 247
  16. 778
  17. 188
  18. 175
  19. 184
  20. 585
  21. 432
  22. 152
  23. 180
  24. 931
  25. 746
  26. 391
  27. 363
  28. 89
  29. 225
  30. 117
  31. 382
  32. 111
  33. 101
  34. 343
  35. 145
  36. 813
  37. 976
  38. 659
  39. 111
  40. 522

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