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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 528 · 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. 1.811 − 143 =
  2. 2.? + 184 = 365
  3. 3.? − 190 = 435
  4. 4.111 + 523 =
  5. 5.772 − 108 =
  6. 6.A school has 346 children. 334 of them are girls. How many boys are there?
  7. 7.A school has 288 children. 124 of them are girls. How many boys are there?
  8. 8.? − 167 = 89
  9. 9.312 − 265 =
  10. 10.378 − 147 =
  11. 11.265 + 353 =
  12. 12.423 − 278 =
  13. 13.? + 396 = 588
  14. 14.463 − ? = 185
  15. 15.911 − 762 =
  16. 16.A train has 490 people in the front coaches and 482 people in the back coaches. How many people are on the train?
  17. 17.? − 186 = 292
  18. 18.382 + 594 =
  19. 19.A school has 274 children. 193 of them are girls. How many boys are there?
  20. 20.A train has 492 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  21. 21.913 − 801 =
  22. 22.? − 149 = 502
  23. 23.? − 261 = 47
  24. 24.547 − 452 =
  25. 25.A school has 210 children. 130 of them are girls. How many boys are there?
  26. 26.234 + 293 =
  27. 27.414 + 307 =
  28. 28.A train has 100 people in the front coaches and 317 people in the back coaches. How many people are on the train?
  29. 29.896 − 100 =
  30. 30.A train has 472 people in the front coaches and 378 people in the back coaches. How many people are on the train?
  31. 31.A school has 281 children. 197 of them are girls. How many boys are there?
  32. 32.145 + 337 =
  33. 33.640 + 298 =
  34. 34.? − 497 = 274
  35. 35.681 − ? = 45
  36. 36.A train has 300 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  37. 37.341 + 510 =
  38. 38.A school has 597 children. 348 of them are girls. How many boys are there?
  39. 39.751 − ? = 299
  40. 40.202 + 356 =

Answer key

  1. 668
  2. 181
  3. 625
  4. 634
  5. 664
  6. 12
  7. 164
  8. 256
  9. 47
  10. 231
  11. 618
  12. 145
  13. 192
  14. 278
  15. 149
  16. 972
  17. 478
  18. 976
  19. 81
  20. 606
  21. 112
  22. 651
  23. 308
  24. 95
  25. 80
  26. 527
  27. 721
  28. 417
  29. 796
  30. 850
  31. 84
  32. 482
  33. 938
  34. 771
  35. 636
  36. 436
  37. 851
  38. 249
  39. 452
  40. 558

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