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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 864 · 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. 1.924 − ? = 538
  2. 2.A school has 322 children. 257 of them are girls. How many boys are there?
  3. 3.? − 636 = 114
  4. 4.A train has 666 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  5. 5.A school has 204 children. 101 of them are girls. How many boys are there?
  6. 6.573 − 122 =
  7. 7.184 + 117 =
  8. 8.805 + ? = 960
  9. 9.175 + ? = 427
  10. 10.993 − 859 =
  11. 11.A train has 367 people in the front coaches and 176 people in the back coaches. How many people are on the train?
  12. 12.407 + 216 =
  13. 13.A school has 215 children. 164 of them are girls. How many boys are there?
  14. 14.830 + 157 =
  15. 15.414 − 110 =
  16. 16.A school has 821 children. 637 of them are girls. How many boys are there?
  17. 17.? − 400 = 124
  18. 18.A school has 314 children. 117 of them are girls. How many boys are there?
  19. 19.A train has 173 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  20. 20.452 − 204 =
  21. 21.782 − 743 =
  22. 22.371 − 186 =
  23. 23.A train has 829 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  24. 24.A train has 803 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  25. 25.202 + 358 =
  26. 26.432 − 287 =
  27. 27.A school has 339 children. 110 of them are girls. How many boys are there?
  28. 28.582 + 381 =
  29. 29.670 + ? = 814
  30. 30.? − 283 = 13
  31. 31.A school has 659 children. 116 of them are girls. How many boys are there?
  32. 32.866 + ? = 968
  33. 33.288 + 140 =
  34. 34.A train has 190 people in the front coaches and 578 people in the back coaches. How many people are on the train?
  35. 35.A train has 684 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  36. 36.856 − 562 =
  37. 37.701 − 637 =
  38. 38.305 − ? = 205
  39. 39.243 + 624 =
  40. 40.131 + 367 =

Answer key

  1. 386
  2. 65
  3. 750
  4. 786
  5. 103
  6. 451
  7. 301
  8. 155
  9. 252
  10. 134
  11. 543
  12. 623
  13. 51
  14. 987
  15. 304
  16. 184
  17. 524
  18. 197
  19. 369
  20. 248
  21. 39
  22. 185
  23. 943
  24. 971
  25. 560
  26. 145
  27. 229
  28. 963
  29. 144
  30. 296
  31. 543
  32. 102
  33. 428
  34. 768
  35. 935
  36. 294
  37. 64
  38. 100
  39. 867
  40. 498

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