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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 557 · 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.? + 126 = 286
  2. 2.A school has 399 children. 127 of them are girls. How many boys are there?
  3. 3.403 − 132 =
  4. 4.282 + 415 =
  5. 5.581 − 567 =
  6. 6.822 + ? = 980
  7. 7.496 + 142 =
  8. 8.222 − 216 =
  9. 9.417 + 442 =
  10. 10.918 − 672 =
  11. 11.A train has 887 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  12. 12.? + 887 = 992
  13. 13.839 + 102 =
  14. 14.A school has 253 children. 157 of them are girls. How many boys are there?
  15. 15.741 − 270 =
  16. 16.? + 188 = 749
  17. 17.A train has 335 people in the front coaches and 569 people in the back coaches. How many people are on the train?
  18. 18.A school has 225 children. 174 of them are girls. How many boys are there?
  19. 19.579 − ? = 153
  20. 20.834 + ? = 940
  21. 21.? − 189 = 178
  22. 22.714 − 362 =
  23. 23.A school has 727 children. 395 of them are girls. How many boys are there?
  24. 24.857 + 110 =
  25. 25.? + 448 = 904
  26. 26.659 + 210 =
  27. 27.798 − ? = 323
  28. 28.654 − ? = 147
  29. 29.935 − 159 =
  30. 30.? + 556 = 757
  31. 31.A school has 587 children. 234 of them are girls. How many boys are there?
  32. 32.? + 761 = 983
  33. 33.370 + 543 =
  34. 34.? − 485 = 259
  35. 35.A train has 293 people in the front coaches and 332 people in the back coaches. How many people are on the train?
  36. 36.247 − ? = 137
  37. 37.? + 789 = 918
  38. 38.239 + 688 =
  39. 39.A school has 857 children. 103 of them are girls. How many boys are there?
  40. 40.A train has 231 people in the front coaches and 565 people in the back coaches. How many people are on the train?

Answer key

  1. 160
  2. 272
  3. 271
  4. 697
  5. 14
  6. 158
  7. 638
  8. 6
  9. 859
  10. 246
  11. 994
  12. 105
  13. 941
  14. 96
  15. 471
  16. 561
  17. 904
  18. 51
  19. 426
  20. 106
  21. 367
  22. 352
  23. 332
  24. 967
  25. 456
  26. 869
  27. 475
  28. 507
  29. 776
  30. 201
  31. 353
  32. 222
  33. 913
  34. 744
  35. 625
  36. 110
  37. 129
  38. 927
  39. 754
  40. 796

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