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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 113 · 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 school has 556 children. 105 of them are girls. How many boys are there?
  2. 2.A school has 425 children. 184 of them are girls. How many boys are there?
  3. 3.A school has 384 children. 331 of them are girls. How many boys are there?
  4. 4.433 − 220 =
  5. 5.A school has 366 children. 124 of them are girls. How many boys are there?
  6. 6.869 + 107 =
  7. 7.208 − ? = 88
  8. 8.A school has 697 children. 418 of them are girls. How many boys are there?
  9. 9.A train has 885 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  10. 10.631 − 411 =
  11. 11.698 − 365 =
  12. 12.A train has 126 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  13. 13.A school has 556 children. 453 of them are girls. How many boys are there?
  14. 14.716 − 558 =
  15. 15.A school has 663 children. 425 of them are girls. How many boys are there?
  16. 16.A school has 360 children. 158 of them are girls. How many boys are there?
  17. 17.298 − 266 =
  18. 18.559 − 300 =
  19. 19.696 − 206 =
  20. 20.? + 657 = 983
  21. 21.667 − ? = 325
  22. 22.262 + 599 =
  23. 23.? − 382 = 164
  24. 24.? + 247 = 795
  25. 25.800 − 682 =
  26. 26.386 + ? = 693
  27. 27.A school has 700 children. 519 of them are girls. How many boys are there?
  28. 28.507 − ? = 273
  29. 29.794 + ? = 912
  30. 30.742 + 103 =
  31. 31.A train has 780 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  32. 32.? − 145 = 729
  33. 33.269 + ? = 693
  34. 34.551 − 251 =
  35. 35.? + 769 = 939
  36. 36.563 + 425 =
  37. 37.A train has 159 people in the front coaches and 423 people in the back coaches. How many people are on the train?
  38. 38.193 + ? = 615
  39. 39.A school has 274 children. 180 of them are girls. How many boys are there?
  40. 40.A train has 424 people in the front coaches and 232 people in the back coaches. How many people are on the train?

Answer key

  1. 451
  2. 241
  3. 53
  4. 213
  5. 242
  6. 976
  7. 120
  8. 279
  9. 988
  10. 220
  11. 333
  12. 274
  13. 103
  14. 158
  15. 238
  16. 202
  17. 32
  18. 259
  19. 490
  20. 326
  21. 342
  22. 861
  23. 546
  24. 548
  25. 118
  26. 307
  27. 181
  28. 234
  29. 118
  30. 845
  31. 915
  32. 874
  33. 424
  34. 300
  35. 170
  36. 988
  37. 582
  38. 422
  39. 94
  40. 656

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