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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 59 · 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. 1.466 + 284 =
  2. 2.463 − ? = 318
  3. 3.A train has 312 people in the front coaches and 658 people in the back coaches. How many people are on the train?
  4. 4.637 − ? = 249
  5. 5.? + 180 = 414
  6. 6.A school has 435 children. 335 of them are girls. How many boys are there?
  7. 7.843 − 202 =
  8. 8.? + 231 = 866
  9. 9.? + 736 = 875
  10. 10.404 + ? = 540
  11. 11.? − 506 = 334
  12. 12.246 − 193 =
  13. 13.506 − 434 =
  14. 14.A train has 505 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  15. 15.A school has 932 children. 677 of them are girls. How many boys are there?
  16. 16.A school has 867 children. 790 of them are girls. How many boys are there?
  17. 17.394 − 195 =
  18. 18.A school has 837 children. 689 of them are girls. How many boys are there?
  19. 19.540 − 184 =
  20. 20.394 + ? = 506
  21. 21.776 − ? = 424
  22. 22.A train has 232 people in the front coaches and 572 people in the back coaches. How many people are on the train?
  23. 23.380 − 297 =
  24. 24.A train has 150 people in the front coaches and 397 people in the back coaches. How many people are on the train?
  25. 25.849 − 620 =
  26. 26.? + 411 = 891
  27. 27.A school has 269 children. 212 of them are girls. How many boys are there?
  28. 28.732 + 196 =
  29. 29.? + 814 = 988
  30. 30.A train has 430 people in the front coaches and 455 people in the back coaches. How many people are on the train?
  31. 31.326 − 134 =
  32. 32.614 + ? = 866
  33. 33.473 − 464 =
  34. 34.A train has 503 people in the front coaches and 266 people in the back coaches. How many people are on the train?
  35. 35.A train has 558 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  36. 36.308 − 262 =
  37. 37.299 − 121 =
  38. 38.426 − 166 =
  39. 39.A school has 684 children. 622 of them are girls. How many boys are there?
  40. 40.620 − ? = 218

Answer key

  1. 750
  2. 145
  3. 970
  4. 388
  5. 234
  6. 100
  7. 641
  8. 635
  9. 139
  10. 136
  11. 840
  12. 53
  13. 72
  14. 635
  15. 255
  16. 77
  17. 199
  18. 148
  19. 356
  20. 112
  21. 352
  22. 804
  23. 83
  24. 547
  25. 229
  26. 480
  27. 57
  28. 928
  29. 174
  30. 885
  31. 192
  32. 252
  33. 9
  34. 769
  35. 835
  36. 46
  37. 178
  38. 260
  39. 62
  40. 402

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