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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 865 · 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. 1.289 + 292 =
  2. 2.233 + 547 =
  3. 3.426 − ? = 88
  4. 4.A school has 290 children. 118 of them are girls. How many boys are there?
  5. 5.? − 155 = 84
  6. 6.A train has 145 people in the front coaches and 814 people in the back coaches. How many people are on the train?
  7. 7.753 − ? = 243
  8. 8.A school has 649 children. 153 of them are girls. How many boys are there?
  9. 9.272 − ? = 161
  10. 10.? − 149 = 261
  11. 11.A train has 687 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  12. 12.685 + ? = 906
  13. 13.A school has 292 children. 241 of them are girls. How many boys are there?
  14. 14.403 − 277 =
  15. 15.A train has 774 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  16. 16.A school has 465 children. 192 of them are girls. How many boys are there?
  17. 17.273 − 214 =
  18. 18.A school has 348 children. 131 of them are girls. How many boys are there?
  19. 19.546 + 427 =
  20. 20.541 + 300 =
  21. 21.684 − 384 =
  22. 22.A school has 840 children. 175 of them are girls. How many boys are there?
  23. 23.A train has 442 people in the front coaches and 542 people in the back coaches. How many people are on the train?
  24. 24.A train has 326 people in the front coaches and 464 people in the back coaches. How many people are on the train?
  25. 25.508 − 447 =
  26. 26.700 − ? = 139
  27. 27.? + 868 = 991
  28. 28.? − 165 = 43
  29. 29.424 − ? = 181
  30. 30.568 + 341 =
  31. 31.A school has 281 children. 140 of them are girls. How many boys are there?
  32. 32.336 − 187 =
  33. 33.456 + ? = 827
  34. 34.277 + ? = 943
  35. 35.882 − 328 =
  36. 36.127 + 177 =
  37. 37.267 − 222 =
  38. 38.A train has 131 people in the front coaches and 473 people in the back coaches. How many people are on the train?
  39. 39.A train has 685 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  40. 40.758 + 149 =

Answer key

  1. 581
  2. 780
  3. 338
  4. 172
  5. 239
  6. 959
  7. 510
  8. 496
  9. 111
  10. 410
  11. 789
  12. 221
  13. 51
  14. 126
  15. 987
  16. 273
  17. 59
  18. 217
  19. 973
  20. 841
  21. 300
  22. 665
  23. 984
  24. 790
  25. 61
  26. 561
  27. 123
  28. 208
  29. 243
  30. 909
  31. 141
  32. 149
  33. 371
  34. 666
  35. 554
  36. 304
  37. 45
  38. 604
  39. 919
  40. 907

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