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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 891 · 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. 1.467 − 335 =
  2. 2.758 + 220 =
  3. 3.702 + 292 =
  4. 4.A school has 909 children. 708 of them are girls. How many boys are there?
  5. 5.196 + ? = 430
  6. 6.A train has 117 people in the front coaches and 411 people in the back coaches. How many people are on the train?
  7. 7.603 + 339 =
  8. 8.681 − ? = 417
  9. 9.209 − 140 =
  10. 10.476 − 457 =
  11. 11.121 + 288 =
  12. 12.? + 156 = 433
  13. 13.448 − ? = 234
  14. 14.872 − ? = 594
  15. 15.? − 693 = 268
  16. 16.? − 297 = 70
  17. 17.888 + 102 =
  18. 18.A school has 960 children. 878 of them are girls. How many boys are there?
  19. 19.517 − ? = 206
  20. 20.652 + 205 =
  21. 21.269 + 107 =
  22. 22.176 + 225 =
  23. 23.? + 788 = 889
  24. 24.572 + 261 =
  25. 25.A train has 788 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  26. 26.A train has 549 people in the front coaches and 245 people in the back coaches. How many people are on the train?
  27. 27.357 − 132 =
  28. 28.A train has 374 people in the front coaches and 221 people in the back coaches. How many people are on the train?
  29. 29.? + 526 = 698
  30. 30.804 + 185 =
  31. 31.248 + ? = 669
  32. 32.? + 176 = 821
  33. 33.421 − 277 =
  34. 34.A train has 802 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  35. 35.? − 178 = 707
  36. 36.A train has 130 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  37. 37.226 + 297 =
  38. 38.? − 626 = 325
  39. 39.604 + ? = 783
  40. 40.A school has 736 children. 526 of them are girls. How many boys are there?

Answer key

  1. 132
  2. 978
  3. 994
  4. 201
  5. 234
  6. 528
  7. 942
  8. 264
  9. 69
  10. 19
  11. 409
  12. 277
  13. 214
  14. 278
  15. 961
  16. 367
  17. 990
  18. 82
  19. 311
  20. 857
  21. 376
  22. 401
  23. 101
  24. 833
  25. 904
  26. 794
  27. 225
  28. 595
  29. 172
  30. 989
  31. 421
  32. 645
  33. 144
  34. 955
  35. 885
  36. 332
  37. 523
  38. 951
  39. 179
  40. 210

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