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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 285 · 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. 1.572 − 414 =
  2. 2.466 − 251 =
  3. 3.938 − 735 =
  4. 4.705 − 475 =
  5. 5.A school has 330 children. 170 of them are girls. How many boys are there?
  6. 6.A school has 310 children. 147 of them are girls. How many boys are there?
  7. 7.A train has 853 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  8. 8.925 − ? = 740
  9. 9.A train has 507 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  10. 10.784 − ? = 417
  11. 11.A school has 851 children. 128 of them are girls. How many boys are there?
  12. 12.854 + ? = 971
  13. 13.A school has 363 children. 285 of them are girls. How many boys are there?
  14. 14.413 − 349 =
  15. 15.686 − 357 =
  16. 16.360 − 354 =
  17. 17.A school has 826 children. 707 of them are girls. How many boys are there?
  18. 18.370 + 296 =
  19. 19.849 − 566 =
  20. 20.216 + 249 =
  21. 21.? − 291 = 379
  22. 22.859 − 746 =
  23. 23.837 − 502 =
  24. 24.A train has 399 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  25. 25.? + 433 = 630
  26. 26.? + 745 = 910
  27. 27.A train has 627 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  28. 28.A school has 425 children. 303 of them are girls. How many boys are there?
  29. 29.? + 776 = 947
  30. 30.373 − 224 =
  31. 31.A train has 541 people in the front coaches and 197 people in the back coaches. How many people are on the train?
  32. 32.622 + 203 =
  33. 33.A school has 808 children. 434 of them are girls. How many boys are there?
  34. 34.A train has 478 people in the front coaches and 221 people in the back coaches. How many people are on the train?
  35. 35.807 − 755 =
  36. 36.A school has 735 children. 291 of them are girls. How many boys are there?
  37. 37.? + 740 = 878
  38. 38.813 − 427 =
  39. 39.679 + 246 =
  40. 40.A train has 753 people in the front coaches and 175 people in the back coaches. How many people are on the train?

Answer key

  1. 158
  2. 215
  3. 203
  4. 230
  5. 160
  6. 163
  7. 965
  8. 185
  9. 742
  10. 367
  11. 723
  12. 117
  13. 78
  14. 64
  15. 329
  16. 6
  17. 119
  18. 666
  19. 283
  20. 465
  21. 670
  22. 113
  23. 335
  24. 629
  25. 197
  26. 165
  27. 828
  28. 122
  29. 171
  30. 149
  31. 738
  32. 825
  33. 374
  34. 699
  35. 52
  36. 444
  37. 138
  38. 386
  39. 925
  40. 928

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