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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 404 · 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. 1.581 − 217 =
  2. 2.A school has 305 children. 232 of them are girls. How many boys are there?
  3. 3.A school has 747 children. 325 of them are girls. How many boys are there?
  4. 4.867 − ? = 397
  5. 5.206 − ? = 19
  6. 6.629 + 333 =
  7. 7.A school has 259 children. 215 of them are girls. How many boys are there?
  8. 8.A school has 242 children. 147 of them are girls. How many boys are there?
  9. 9.685 + 273 =
  10. 10.462 − 340 =
  11. 11.A train has 882 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  12. 12.797 − 745 =
  13. 13.770 − 189 =
  14. 14.430 + ? = 895
  15. 15.? − 557 = 321
  16. 16.A train has 841 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  17. 17.481 − ? = 129
  18. 18.813 + ? = 923
  19. 19.667 + 157 =
  20. 20.A school has 749 children. 495 of them are girls. How many boys are there?
  21. 21.A school has 273 children. 101 of them are girls. How many boys are there?
  22. 22.193 + 408 =
  23. 23.A train has 272 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  24. 24.A train has 778 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  25. 25.288 − 262 =
  26. 26.389 + 308 =
  27. 27.? + 513 = 704
  28. 28.A train has 109 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  29. 29.484 − 283 =
  30. 30.A train has 123 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  31. 31.749 − 461 =
  32. 32.? + 156 = 931
  33. 33.A train has 357 people in the front coaches and 488 people in the back coaches. How many people are on the train?
  34. 34.A school has 468 children. 183 of them are girls. How many boys are there?
  35. 35.288 + 664 =
  36. 36.717 + ? = 821
  37. 37.? + 434 = 754
  38. 38.465 + ? = 656
  39. 39.351 − 146 =
  40. 40.478 − ? = 236

Answer key

  1. 364
  2. 73
  3. 422
  4. 470
  5. 187
  6. 962
  7. 44
  8. 95
  9. 958
  10. 122
  11. 994
  12. 52
  13. 581
  14. 465
  15. 878
  16. 955
  17. 352
  18. 110
  19. 824
  20. 254
  21. 172
  22. 601
  23. 526
  24. 927
  25. 26
  26. 697
  27. 191
  28. 512
  29. 201
  30. 310
  31. 288
  32. 775
  33. 845
  34. 285
  35. 952
  36. 104
  37. 320
  38. 191
  39. 205
  40. 242

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