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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 848 · 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. 1.476 + 312 =
  2. 2.A school has 622 children. 523 of them are girls. How many boys are there?
  3. 3.854 − 827 =
  4. 4.? + 106 = 998
  5. 5.A train has 584 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  6. 6.A train has 618 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  7. 7.A train has 110 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  8. 8.A train has 181 people in the front coaches and 716 people in the back coaches. How many people are on the train?
  9. 9.491 + 345 =
  10. 10.686 − 514 =
  11. 11.291 − 110 =
  12. 12.564 + ? = 697
  13. 13.382 − 349 =
  14. 14.407 − 232 =
  15. 15.? + 639 = 772
  16. 16.489 − 455 =
  17. 17.A train has 781 people in the front coaches and 215 people in the back coaches. How many people are on the train?
  18. 18.A train has 394 people in the front coaches and 249 people in the back coaches. How many people are on the train?
  19. 19.394 + ? = 932
  20. 20.283 − 172 =
  21. 21.295 − 233 =
  22. 22.A school has 837 children. 739 of them are girls. How many boys are there?
  23. 23.290 − 159 =
  24. 24.235 + 556 =
  25. 25.A train has 107 people in the front coaches and 375 people in the back coaches. How many people are on the train?
  26. 26.747 − ? = 88
  27. 27.469 − 293 =
  28. 28.? − 125 = 335
  29. 29.? + 589 = 972
  30. 30.A school has 465 children. 294 of them are girls. How many boys are there?
  31. 31.314 + ? = 938
  32. 32.? + 474 = 780
  33. 33.A train has 512 people in the front coaches and 384 people in the back coaches. How many people are on the train?
  34. 34.A school has 561 children. 418 of them are girls. How many boys are there?
  35. 35.379 + 208 =
  36. 36.433 − 336 =
  37. 37.A school has 773 children. 418 of them are girls. How many boys are there?
  38. 38.A school has 210 children. 106 of them are girls. How many boys are there?
  39. 39.A train has 147 people in the front coaches and 742 people in the back coaches. How many people are on the train?
  40. 40.A school has 828 children. 381 of them are girls. How many boys are there?

Answer key

  1. 788
  2. 99
  3. 27
  4. 892
  5. 715
  6. 820
  7. 323
  8. 897
  9. 836
  10. 172
  11. 181
  12. 133
  13. 33
  14. 175
  15. 133
  16. 34
  17. 996
  18. 643
  19. 538
  20. 111
  21. 62
  22. 98
  23. 131
  24. 791
  25. 482
  26. 659
  27. 176
  28. 460
  29. 383
  30. 171
  31. 624
  32. 306
  33. 896
  34. 143
  35. 587
  36. 97
  37. 355
  38. 104
  39. 889
  40. 447

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