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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 909 · 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.A train has 875 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  2. 2.A train has 147 people in the front coaches and 742 people in the back coaches. How many people are on the train?
  3. 3.654 + ? = 933
  4. 4.A school has 562 children. 453 of them are girls. How many boys are there?
  5. 5.A train has 154 people in the front coaches and 265 people in the back coaches. How many people are on the train?
  6. 6.262 − 215 =
  7. 7.797 + 104 =
  8. 8.688 − ? = 505
  9. 9.555 + 178 =
  10. 10.439 + 257 =
  11. 11.A school has 494 children. 418 of them are girls. How many boys are there?
  12. 12.313 − 100 =
  13. 13.568 + 403 =
  14. 14.? − 141 = 67
  15. 15.? + 193 = 660
  16. 16.A train has 366 people in the front coaches and 204 people in the back coaches. How many people are on the train?
  17. 17.259 + ? = 458
  18. 18.169 + 768 =
  19. 19.559 + 195 =
  20. 20.? + 775 = 978
  21. 21.144 + 519 =
  22. 22.A train has 742 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  23. 23.A school has 496 children. 328 of them are girls. How many boys are there?
  24. 24.A school has 480 children. 160 of them are girls. How many boys are there?
  25. 25.A school has 552 children. 220 of them are girls. How many boys are there?
  26. 26.300 − ? = 11
  27. 27.? − 441 = 48
  28. 28.A train has 110 people in the front coaches and 842 people in the back coaches. How many people are on the train?
  29. 29.451 − ? = 4
  30. 30.486 − 200 =
  31. 31.230 + 213 =
  32. 32.123 + ? = 957
  33. 33.A train has 271 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  34. 34.211 + ? = 796
  35. 35.? − 158 = 265
  36. 36.303 − 301 =
  37. 37.253 + 219 =
  38. 38.869 + 123 =
  39. 39.778 − 506 =
  40. 40.A school has 484 children. 457 of them are girls. How many boys are there?

Answer key

  1. 981
  2. 889
  3. 279
  4. 109
  5. 419
  6. 47
  7. 901
  8. 183
  9. 733
  10. 696
  11. 76
  12. 213
  13. 971
  14. 208
  15. 467
  16. 570
  17. 199
  18. 937
  19. 754
  20. 203
  21. 663
  22. 884
  23. 168
  24. 320
  25. 332
  26. 289
  27. 489
  28. 952
  29. 447
  30. 286
  31. 443
  32. 834
  33. 923
  34. 585
  35. 423
  36. 2
  37. 472
  38. 992
  39. 272
  40. 27

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