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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 369 · 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.? − 102 = 105
  2. 2.A train has 587 people in the front coaches and 295 people in the back coaches. How many people are on the train?
  3. 3.679 − 263 =
  4. 4.472 − ? = 261
  5. 5.989 − 352 =
  6. 6.671 − ? = 557
  7. 7.A school has 210 children. 206 of them are girls. How many boys are there?
  8. 8.A train has 509 people in the front coaches and 326 people in the back coaches. How many people are on the train?
  9. 9.A train has 378 people in the front coaches and 339 people in the back coaches. How many people are on the train?
  10. 10.848 − 766 =
  11. 11.470 − 315 =
  12. 12.762 − 661 =
  13. 13.A school has 204 children. 131 of them are girls. How many boys are there?
  14. 14.367 − 350 =
  15. 15.? + 616 = 729
  16. 16.A train has 732 people in the front coaches and 266 people in the back coaches. How many people are on the train?
  17. 17.208 + 728 =
  18. 18.281 + ? = 423
  19. 19.A school has 750 children. 218 of them are girls. How many boys are there?
  20. 20.A train has 542 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  21. 21.A school has 758 children. 422 of them are girls. How many boys are there?
  22. 22.815 + 155 =
  23. 23.A train has 769 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  24. 24.A school has 969 children. 223 of them are girls. How many boys are there?
  25. 25.A train has 564 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  26. 26.A school has 754 children. 493 of them are girls. How many boys are there?
  27. 27.A train has 378 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  28. 28.A train has 832 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  29. 29.A school has 621 children. 578 of them are girls. How many boys are there?
  30. 30.A train has 340 people in the front coaches and 397 people in the back coaches. How many people are on the train?
  31. 31.837 − 242 =
  32. 32.A school has 668 children. 583 of them are girls. How many boys are there?
  33. 33.? − 154 = 276
  34. 34.751 − 155 =
  35. 35.521 − ? = 210
  36. 36.A school has 398 children. 348 of them are girls. How many boys are there?
  37. 37.A school has 673 children. 259 of them are girls. How many boys are there?
  38. 38.927 − 402 =
  39. 39.? + 578 = 849
  40. 40.413 − 246 =

Answer key

  1. 207
  2. 882
  3. 416
  4. 211
  5. 637
  6. 114
  7. 4
  8. 835
  9. 717
  10. 82
  11. 155
  12. 101
  13. 73
  14. 17
  15. 113
  16. 998
  17. 936
  18. 142
  19. 532
  20. 738
  21. 336
  22. 970
  23. 913
  24. 746
  25. 756
  26. 261
  27. 613
  28. 962
  29. 43
  30. 737
  31. 595
  32. 85
  33. 430
  34. 596
  35. 311
  36. 50
  37. 414
  38. 525
  39. 271
  40. 167

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