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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 210 · 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. 1.443 − ? = 338
  2. 2.A school has 552 children. 128 of them are girls. How many boys are there?
  3. 3.627 − 171 =
  4. 4.? − 105 = 496
  5. 5.554 + 203 =
  6. 6.636 − ? = 115
  7. 7.250 − ? = 103
  8. 8.317 − ? = 205
  9. 9.807 − 393 =
  10. 10.770 − ? = 471
  11. 11.627 + 118 =
  12. 12.824 − 576 =
  13. 13.542 + 322 =
  14. 14.755 − 317 =
  15. 15.? + 613 = 798
  16. 16.156 + 188 =
  17. 17.733 + 220 =
  18. 18.606 − 208 =
  19. 19.A train has 591 people in the front coaches and 175 people in the back coaches. How many people are on the train?
  20. 20.? − 225 = 597
  21. 21.A train has 263 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  22. 22.A train has 152 people in the front coaches and 695 people in the back coaches. How many people are on the train?
  23. 23.331 + ? = 516
  24. 24.174 + 469 =
  25. 25.643 + ? = 765
  26. 26.A train has 754 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  27. 27.? − 293 = 171
  28. 28.194 + 429 =
  29. 29.736 − 305 =
  30. 30.958 − 819 =
  31. 31.A train has 419 people in the front coaches and 261 people in the back coaches. How many people are on the train?
  32. 32.A school has 211 children. 196 of them are girls. How many boys are there?
  33. 33.526 + 166 =
  34. 34.223 − 142 =
  35. 35.433 + 372 =
  36. 36.A train has 230 people in the front coaches and 464 people in the back coaches. How many people are on the train?
  37. 37.A train has 212 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  38. 38.376 + 441 =
  39. 39.A school has 840 children. 436 of them are girls. How many boys are there?
  40. 40.667 − 302 =

Answer key

  1. 105
  2. 424
  3. 456
  4. 601
  5. 757
  6. 521
  7. 147
  8. 112
  9. 414
  10. 299
  11. 745
  12. 248
  13. 864
  14. 438
  15. 185
  16. 344
  17. 953
  18. 398
  19. 766
  20. 822
  21. 411
  22. 847
  23. 185
  24. 643
  25. 122
  26. 922
  27. 464
  28. 623
  29. 431
  30. 139
  31. 680
  32. 15
  33. 692
  34. 81
  35. 805
  36. 694
  37. 402
  38. 817
  39. 404
  40. 365

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