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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 81 · 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. 1.226 − 160 =
  2. 2.A train has 535 people in the front coaches and 361 people in the back coaches. How many people are on the train?
  3. 3.493 + 173 =
  4. 4.782 − 193 =
  5. 5.A school has 550 children. 267 of them are girls. How many boys are there?
  6. 6.257 + 101 =
  7. 7.A train has 871 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  8. 8.832 − 551 =
  9. 9.A train has 112 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  10. 10.989 − ? = 589
  11. 11.A train has 588 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  12. 12.425 − ? = 194
  13. 13.781 − ? = 532
  14. 14.295 − 236 =
  15. 15.555 − 312 =
  16. 16.652 − 520 =
  17. 17.A train has 278 people in the front coaches and 521 people in the back coaches. How many people are on the train?
  18. 18.214 − 192 =
  19. 19.266 − 163 =
  20. 20.? − 153 = 200
  21. 21.533 − 426 =
  22. 22.A school has 372 children. 332 of them are girls. How many boys are there?
  23. 23.A train has 869 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  24. 24.525 + ? = 690
  25. 25.599 − 272 =
  26. 26.A train has 121 people in the front coaches and 565 people in the back coaches. How many people are on the train?
  27. 27.868 + 109 =
  28. 28.A train has 506 people in the front coaches and 367 people in the back coaches. How many people are on the train?
  29. 29.401 − 135 =
  30. 30.A train has 181 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  31. 31.A train has 237 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  32. 32.688 − 470 =
  33. 33.366 + 506 =
  34. 34.616 − 411 =
  35. 35.995 − 562 =
  36. 36.771 − ? = 435
  37. 37.833 + 101 =
  38. 38.? − 487 = 413
  39. 39.256 − 161 =
  40. 40.? + 486 = 635

Answer key

  1. 66
  2. 896
  3. 666
  4. 589
  5. 283
  6. 358
  7. 975
  8. 281
  9. 321
  10. 400
  11. 743
  12. 231
  13. 249
  14. 59
  15. 243
  16. 132
  17. 799
  18. 22
  19. 103
  20. 353
  21. 107
  22. 40
  23. 969
  24. 165
  25. 327
  26. 686
  27. 977
  28. 873
  29. 266
  30. 334
  31. 362
  32. 218
  33. 872
  34. 205
  35. 433
  36. 336
  37. 934
  38. 900
  39. 95
  40. 149

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