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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 714 · 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.? + 544 = 913
  2. 2.216 − ? = 85
  3. 3.A train has 553 people in the front coaches and 359 people in the back coaches. How many people are on the train?
  4. 4.532 + ? = 965
  5. 5.881 − ? = 732
  6. 6.725 + 111 =
  7. 7.A school has 706 children. 340 of them are girls. How many boys are there?
  8. 8.A train has 595 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  9. 9.A school has 306 children. 177 of them are girls. How many boys are there?
  10. 10.A train has 211 people in the front coaches and 441 people in the back coaches. How many people are on the train?
  11. 11.A train has 617 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  12. 12.836 − 122 =
  13. 13.A school has 459 children. 270 of them are girls. How many boys are there?
  14. 14.A school has 725 children. 307 of them are girls. How many boys are there?
  15. 15.210 + 396 =
  16. 16.A school has 552 children. 253 of them are girls. How many boys are there?
  17. 17.? + 699 = 860
  18. 18.635 − 505 =
  19. 19.566 − 530 =
  20. 20.523 − ? = 252
  21. 21.542 + 233 =
  22. 22.192 + 541 =
  23. 23.A train has 801 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  24. 24.342 − ? = 55
  25. 25.926 − 805 =
  26. 26.882 − 556 =
  27. 27.348 + 552 =
  28. 28.A school has 490 children. 394 of them are girls. How many boys are there?
  29. 29.? − 204 = 146
  30. 30.821 − ? = 464
  31. 31.581 − 128 =
  32. 32.A train has 383 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  33. 33.A school has 276 children. 244 of them are girls. How many boys are there?
  34. 34.? + 228 = 362
  35. 35.? + 108 = 490
  36. 36.426 − 148 =
  37. 37.A school has 314 children. 145 of them are girls. How many boys are there?
  38. 38.261 − 254 =
  39. 39.212 + 327 =
  40. 40.317 + 371 =

Answer key

  1. 369
  2. 131
  3. 912
  4. 433
  5. 149
  6. 836
  7. 366
  8. 809
  9. 129
  10. 652
  11. 941
  12. 714
  13. 189
  14. 418
  15. 606
  16. 299
  17. 161
  18. 130
  19. 36
  20. 271
  21. 775
  22. 733
  23. 975
  24. 287
  25. 121
  26. 326
  27. 900
  28. 96
  29. 350
  30. 357
  31. 453
  32. 585
  33. 32
  34. 134
  35. 382
  36. 278
  37. 169
  38. 7
  39. 539
  40. 688

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