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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 761 · 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. 1.253 + ? = 915
  2. 2.654 − 390 =
  3. 3.430 + ? = 558
  4. 4.A train has 598 people in the front coaches and 327 people in the back coaches. How many people are on the train?
  5. 5.A school has 644 children. 384 of them are girls. How many boys are there?
  6. 6.A school has 589 children. 482 of them are girls. How many boys are there?
  7. 7.A school has 348 children. 241 of them are girls. How many boys are there?
  8. 8.A train has 310 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  9. 9.366 + 567 =
  10. 10.633 − 467 =
  11. 11.? + 780 = 960
  12. 12.158 + 187 =
  13. 13.242 − ? = 59
  14. 14.? − 615 = 151
  15. 15.813 − ? = 283
  16. 16.A school has 951 children. 803 of them are girls. How many boys are there?
  17. 17.292 + 511 =
  18. 18.? − 219 = 150
  19. 19.A school has 762 children. 197 of them are girls. How many boys are there?
  20. 20.A train has 692 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  21. 21.843 − 111 =
  22. 22.517 − 367 =
  23. 23.313 + ? = 444
  24. 24.299 + 235 =
  25. 25.587 + 148 =
  26. 26.A school has 901 children. 122 of them are girls. How many boys are there?
  27. 27.852 − 116 =
  28. 28.531 − 507 =
  29. 29.A school has 368 children. 222 of them are girls. How many boys are there?
  30. 30.698 + 128 =
  31. 31.445 − ? = 36
  32. 32.A school has 383 children. 236 of them are girls. How many boys are there?
  33. 33.A school has 456 children. 455 of them are girls. How many boys are there?
  34. 34.A school has 951 children. 351 of them are girls. How many boys are there?
  35. 35.A train has 420 people in the front coaches and 466 people in the back coaches. How many people are on the train?
  36. 36.471 − 133 =
  37. 37.A train has 663 people in the front coaches and 189 people in the back coaches. How many people are on the train?
  38. 38.A train has 130 people in the front coaches and 697 people in the back coaches. How many people are on the train?
  39. 39.721 + 144 =
  40. 40.107 + 817 =

Answer key

  1. 662
  2. 264
  3. 128
  4. 925
  5. 260
  6. 107
  7. 107
  8. 451
  9. 933
  10. 166
  11. 180
  12. 345
  13. 183
  14. 766
  15. 530
  16. 148
  17. 803
  18. 369
  19. 565
  20. 841
  21. 732
  22. 150
  23. 131
  24. 534
  25. 735
  26. 779
  27. 736
  28. 24
  29. 146
  30. 826
  31. 409
  32. 147
  33. 1
  34. 600
  35. 886
  36. 338
  37. 852
  38. 827
  39. 865
  40. 924

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