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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 732 · 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.? + 539 = 983
  2. 2.? − 174 = 93
  3. 3.999 − 544 =
  4. 4.253 − ? = 121
  5. 5.286 − 131 =
  6. 6.A train has 503 people in the front coaches and 239 people in the back coaches. How many people are on the train?
  7. 7.902 − 743 =
  8. 8.546 + 161 =
  9. 9.382 + 210 =
  10. 10.A train has 412 people in the front coaches and 306 people in the back coaches. How many people are on the train?
  11. 11.A school has 818 children. 611 of them are girls. How many boys are there?
  12. 12.A train has 169 people in the front coaches and 640 people in the back coaches. How many people are on the train?
  13. 13.684 + ? = 931
  14. 14.A school has 790 children. 295 of them are girls. How many boys are there?
  15. 15.451 + 464 =
  16. 16.A train has 137 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  17. 17.A train has 280 people in the front coaches and 670 people in the back coaches. How many people are on the train?
  18. 18.200 + ? = 924
  19. 19.759 + 178 =
  20. 20.254 − 236 =
  21. 21.A train has 457 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  22. 22.668 − 167 =
  23. 23.A train has 178 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  24. 24.726 − 668 =
  25. 25.916 − ? = 259
  26. 26.? − 465 = 282
  27. 27.315 − ? = 184
  28. 28.487 + ? = 757
  29. 29.603 − ? = 23
  30. 30.593 + 225 =
  31. 31.A train has 260 people in the front coaches and 515 people in the back coaches. How many people are on the train?
  32. 32.466 − 187 =
  33. 33.263 − 143 =
  34. 34.388 − 202 =
  35. 35.A school has 363 children. 168 of them are girls. How many boys are there?
  36. 36.371 + 173 =
  37. 37.A train has 297 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  38. 38.216 − ? = 40
  39. 39.811 + ? = 922
  40. 40.355 + 333 =

Answer key

  1. 444
  2. 267
  3. 455
  4. 132
  5. 155
  6. 742
  7. 159
  8. 707
  9. 592
  10. 718
  11. 207
  12. 809
  13. 247
  14. 495
  15. 915
  16. 447
  17. 950
  18. 724
  19. 937
  20. 18
  21. 767
  22. 501
  23. 446
  24. 58
  25. 657
  26. 747
  27. 131
  28. 270
  29. 580
  30. 818
  31. 775
  32. 279
  33. 120
  34. 186
  35. 195
  36. 544
  37. 479
  38. 176
  39. 111
  40. 688

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