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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 937 · 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. 1.419 − 412 =
  2. 2.419 − ? = 97
  3. 3.891 − ? = 699
  4. 4.770 − 230 =
  5. 5.918 − 571 =
  6. 6.150 + 183 =
  7. 7.? − 275 = 463
  8. 8.A train has 778 people in the front coaches and 220 people in the back coaches. How many people are on the train?
  9. 9.A train has 321 people in the front coaches and 552 people in the back coaches. How many people are on the train?
  10. 10.? + 216 = 620
  11. 11.637 − 534 =
  12. 12.817 − ? = 672
  13. 13.426 − 190 =
  14. 14.966 − 588 =
  15. 15.835 − 539 =
  16. 16.A train has 296 people in the front coaches and 593 people in the back coaches. How many people are on the train?
  17. 17.666 + 120 =
  18. 18.A train has 225 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  19. 19.388 + ? = 702
  20. 20.415 − 294 =
  21. 21.? − 148 = 574
  22. 22.A school has 848 children. 380 of them are girls. How many boys are there?
  23. 23.307 + 392 =
  24. 24.A school has 946 children. 497 of them are girls. How many boys are there?
  25. 25.A train has 125 people in the front coaches and 844 people in the back coaches. How many people are on the train?
  26. 26.A train has 679 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  27. 27.308 − 152 =
  28. 28.583 + ? = 848
  29. 29.? − 161 = 162
  30. 30.812 − 700 =
  31. 31.A train has 311 people in the front coaches and 363 people in the back coaches. How many people are on the train?
  32. 32.A train has 589 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  33. 33.A school has 416 children. 251 of them are girls. How many boys are there?
  34. 34.201 + 127 =
  35. 35.615 + 220 =
  36. 36.104 + 467 =
  37. 37.553 + ? = 775
  38. 38.498 − 293 =
  39. 39.? − 185 = 81
  40. 40.886 + ? = 998

Answer key

  1. 7
  2. 322
  3. 192
  4. 540
  5. 347
  6. 333
  7. 738
  8. 998
  9. 873
  10. 404
  11. 103
  12. 145
  13. 236
  14. 378
  15. 296
  16. 889
  17. 786
  18. 417
  19. 314
  20. 121
  21. 722
  22. 468
  23. 699
  24. 449
  25. 969
  26. 808
  27. 156
  28. 265
  29. 323
  30. 112
  31. 674
  32. 820
  33. 165
  34. 328
  35. 835
  36. 571
  37. 222
  38. 205
  39. 266
  40. 112

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