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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 933 · 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.? + 248 = 540
  2. 2.A school has 225 children. 103 of them are girls. How many boys are there?
  3. 3.984 − 523 =
  4. 4.A train has 339 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  5. 5.698 − 274 =
  6. 6.A train has 875 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  7. 7.? − 101 = 887
  8. 8.? − 102 = 468
  9. 9.? − 761 = 21
  10. 10.? + 219 = 639
  11. 11.306 + 467 =
  12. 12.784 + ? = 996
  13. 13.A train has 288 people in the front coaches and 239 people in the back coaches. How many people are on the train?
  14. 14.A train has 651 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  15. 15.439 + ? = 881
  16. 16.A school has 818 children. 310 of them are girls. How many boys are there?
  17. 17.? + 155 = 752
  18. 18.544 + ? = 810
  19. 19.914 − ? = 244
  20. 20.A school has 434 children. 130 of them are girls. How many boys are there?
  21. 21.296 − ? = 40
  22. 22.560 − 164 =
  23. 23.? − 220 = 700
  24. 24.486 + 214 =
  25. 25.A train has 318 people in the front coaches and 620 people in the back coaches. How many people are on the train?
  26. 26.? − 250 = 47
  27. 27.A train has 868 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  28. 28.A train has 439 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  29. 29.A train has 779 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  30. 30.399 − 209 =
  31. 31.A school has 805 children. 378 of them are girls. How many boys are there?
  32. 32.553 + ? = 730
  33. 33.A school has 673 children. 410 of them are girls. How many boys are there?
  34. 34.815 + 110 =
  35. 35.? + 394 = 526
  36. 36.A school has 338 children. 187 of them are girls. How many boys are there?
  37. 37.391 + 564 =
  38. 38.559 + 167 =
  39. 39.A school has 307 children. 147 of them are girls. How many boys are there?
  40. 40.A school has 547 children. 230 of them are girls. How many boys are there?

Answer key

  1. 292
  2. 122
  3. 461
  4. 502
  5. 424
  6. 978
  7. 988
  8. 570
  9. 782
  10. 420
  11. 773
  12. 212
  13. 527
  14. 853
  15. 442
  16. 508
  17. 597
  18. 266
  19. 670
  20. 304
  21. 256
  22. 396
  23. 920
  24. 700
  25. 938
  26. 297
  27. 969
  28. 544
  29. 951
  30. 190
  31. 427
  32. 177
  33. 263
  34. 925
  35. 132
  36. 151
  37. 955
  38. 726
  39. 160
  40. 317

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