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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 571 · 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. 1.165 + ? = 699
  2. 2.? − 286 = 224
  3. 3.A school has 871 children. 743 of them are girls. How many boys are there?
  4. 4.A train has 714 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  5. 5.? − 608 = 255
  6. 6.? − 185 = 15
  7. 7.297 − ? = 98
  8. 8.680 + 199 =
  9. 9.A train has 710 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  10. 10.361 − 183 =
  11. 11.A train has 830 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  12. 12.671 − 357 =
  13. 13.443 − 397 =
  14. 14.417 + 284 =
  15. 15.A school has 558 children. 359 of them are girls. How many boys are there?
  16. 16.132 + 157 =
  17. 17.A school has 875 children. 865 of them are girls. How many boys are there?
  18. 18.A school has 650 children. 160 of them are girls. How many boys are there?
  19. 19.305 + ? = 722
  20. 20.366 − ? = 4
  21. 21.? − 243 = 35
  22. 22.819 − 339 =
  23. 23.668 + ? = 804
  24. 24.614 + ? = 962
  25. 25.A train has 807 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  26. 26.? + 547 = 727
  27. 27.A train has 821 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  28. 28.A train has 872 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  29. 29.A school has 403 children. 290 of them are girls. How many boys are there?
  30. 30.609 + ? = 845
  31. 31.? − 320 = 10
  32. 32.? + 783 = 889
  33. 33.781 − 457 =
  34. 34.? − 383 = 135
  35. 35.170 + 559 =
  36. 36.694 − ? = 359
  37. 37.A train has 863 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  38. 38.A school has 385 children. 162 of them are girls. How many boys are there?
  39. 39.398 − 169 =
  40. 40.A train has 460 people in the front coaches and 337 people in the back coaches. How many people are on the train?

Answer key

  1. 534
  2. 510
  3. 128
  4. 862
  5. 863
  6. 200
  7. 199
  8. 879
  9. 830
  10. 178
  11. 933
  12. 314
  13. 46
  14. 701
  15. 199
  16. 289
  17. 10
  18. 490
  19. 417
  20. 362
  21. 278
  22. 480
  23. 136
  24. 348
  25. 953
  26. 180
  27. 999
  28. 980
  29. 113
  30. 236
  31. 330
  32. 106
  33. 324
  34. 518
  35. 729
  36. 335
  37. 973
  38. 223
  39. 229
  40. 797

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