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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 357 · 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. 1.834 − ? = 157
  2. 2.428 + 300 =
  3. 3.330 + ? = 570
  4. 4.A train has 562 people in the front coaches and 358 people in the back coaches. How many people are on the train?
  5. 5.A train has 325 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  6. 6.? − 239 = 414
  7. 7.159 + ? = 657
  8. 8.A train has 721 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  9. 9.954 − ? = 598
  10. 10.? + 515 = 715
  11. 11.183 + 642 =
  12. 12.A train has 650 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  13. 13.457 − 142 =
  14. 14.A school has 795 children. 708 of them are girls. How many boys are there?
  15. 15.A school has 612 children. 142 of them are girls. How many boys are there?
  16. 16.803 − 303 =
  17. 17.A train has 242 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  18. 18.551 + 288 =
  19. 19.A train has 240 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  20. 20.A train has 346 people in the front coaches and 528 people in the back coaches. How many people are on the train?
  21. 21.? + 450 = 658
  22. 22.A school has 306 children. 233 of them are girls. How many boys are there?
  23. 23.627 − 235 =
  24. 24.? − 174 = 100
  25. 25.? − 221 = 92
  26. 26.294 + ? = 635
  27. 27.585 + 315 =
  28. 28.A train has 693 people in the front coaches and 227 people in the back coaches. How many people are on the train?
  29. 29.585 + 368 =
  30. 30.334 + 315 =
  31. 31.503 + 119 =
  32. 32.? − 144 = 90
  33. 33.502 − 445 =
  34. 34.A train has 873 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  35. 35.? − 211 = 184
  36. 36.490 + ? = 938
  37. 37.334 − ? = 173
  38. 38.? − 741 = 14
  39. 39.? + 143 = 968
  40. 40.835 + ? = 995

Answer key

  1. 677
  2. 728
  3. 240
  4. 920
  5. 531
  6. 653
  7. 498
  8. 858
  9. 356
  10. 200
  11. 825
  12. 765
  13. 315
  14. 87
  15. 470
  16. 500
  17. 428
  18. 839
  19. 502
  20. 874
  21. 208
  22. 73
  23. 392
  24. 274
  25. 313
  26. 341
  27. 900
  28. 920
  29. 953
  30. 649
  31. 622
  32. 234
  33. 57
  34. 998
  35. 395
  36. 448
  37. 161
  38. 755
  39. 825
  40. 160

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