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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 57 · 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. 1.396 − 226 =
  2. 2.786 − 377 =
  3. 3.978 − 952 =
  4. 4.872 − ? = 582
  5. 5.455 + 477 =
  6. 6.A school has 731 children. 660 of them are girls. How many boys are there?
  7. 7.A school has 684 children. 605 of them are girls. How many boys are there?
  8. 8.? + 282 = 390
  9. 9.214 + ? = 740
  10. 10.A train has 176 people in the front coaches and 399 people in the back coaches. How many people are on the train?
  11. 11.A school has 214 children. 111 of them are girls. How many boys are there?
  12. 12.A school has 431 children. 188 of them are girls. How many boys are there?
  13. 13.A train has 641 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  14. 14.350 − ? = 214
  15. 15.A train has 603 people in the front coaches and 217 people in the back coaches. How many people are on the train?
  16. 16.A school has 228 children. 154 of them are girls. How many boys are there?
  17. 17.A school has 299 children. 245 of them are girls. How many boys are there?
  18. 18.340 − ? = 149
  19. 19.743 + ? = 990
  20. 20.602 + 318 =
  21. 21.806 − 557 =
  22. 22.799 + 127 =
  23. 23.A school has 286 children. 175 of them are girls. How many boys are there?
  24. 24.? − 142 = 834
  25. 25.668 − 343 =
  26. 26.A school has 794 children. 336 of them are girls. How many boys are there?
  27. 27.A train has 528 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  28. 28.640 + ? = 957
  29. 29.393 − 110 =
  30. 30.771 + 123 =
  31. 31.396 − ? = 10
  32. 32.A school has 814 children. 231 of them are girls. How many boys are there?
  33. 33.772 − ? = 367
  34. 34.741 − 699 =
  35. 35.189 + ? = 388
  36. 36.816 + 109 =
  37. 37.? − 333 = 54
  38. 38.405 − 150 =
  39. 39.A train has 394 people in the front coaches and 431 people in the back coaches. How many people are on the train?
  40. 40.A train has 261 people in the front coaches and 144 people in the back coaches. How many people are on the train?

Answer key

  1. 170
  2. 409
  3. 26
  4. 290
  5. 932
  6. 71
  7. 79
  8. 108
  9. 526
  10. 575
  11. 103
  12. 243
  13. 804
  14. 136
  15. 820
  16. 74
  17. 54
  18. 191
  19. 247
  20. 920
  21. 249
  22. 926
  23. 111
  24. 976
  25. 325
  26. 458
  27. 692
  28. 317
  29. 283
  30. 894
  31. 386
  32. 583
  33. 405
  34. 42
  35. 199
  36. 925
  37. 387
  38. 255
  39. 825
  40. 405

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