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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 529 · 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 train has 543 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  2. 2.268 + ? = 557
  3. 3.A train has 621 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  4. 4.290 − 285 =
  5. 5.158 + ? = 599
  6. 6.645 − 380 =
  7. 7.765 + ? = 925
  8. 8.? + 336 = 594
  9. 9.341 + 110 =
  10. 10.A train has 222 people in the front coaches and 720 people in the back coaches. How many people are on the train?
  11. 11.461 − 265 =
  12. 12.632 + ? = 890
  13. 13.632 − 495 =
  14. 14.893 − ? = 787
  15. 15.? − 227 = 31
  16. 16.529 + 465 =
  17. 17.874 − 626 =
  18. 18.A train has 182 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  19. 19.A train has 281 people in the front coaches and 363 people in the back coaches. How many people are on the train?
  20. 20.487 − 431 =
  21. 21.A school has 459 children. 207 of them are girls. How many boys are there?
  22. 22.895 − 266 =
  23. 23.A school has 403 children. 384 of them are girls. How many boys are there?
  24. 24.767 + ? = 922
  25. 25.806 + 193 =
  26. 26.258 + 134 =
  27. 27.271 − 131 =
  28. 28.A school has 869 children. 560 of them are girls. How many boys are there?
  29. 29.142 + 428 =
  30. 30.A train has 311 people in the front coaches and 304 people in the back coaches. How many people are on the train?
  31. 31.A school has 804 children. 179 of them are girls. How many boys are there?
  32. 32.359 − 221 =
  33. 33.285 − 231 =
  34. 34.305 + ? = 456
  35. 35.? + 361 = 746
  36. 36.213 + ? = 680
  37. 37.A train has 300 people in the front coaches and 675 people in the back coaches. How many people are on the train?
  38. 38.436 − ? = 182
  39. 39.A train has 770 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  40. 40.A school has 448 children. 263 of them are girls. How many boys are there?

Answer key

  1. 701
  2. 289
  3. 729
  4. 5
  5. 441
  6. 265
  7. 160
  8. 258
  9. 451
  10. 942
  11. 196
  12. 258
  13. 137
  14. 106
  15. 258
  16. 994
  17. 248
  18. 461
  19. 644
  20. 56
  21. 252
  22. 629
  23. 19
  24. 155
  25. 999
  26. 392
  27. 140
  28. 309
  29. 570
  30. 615
  31. 625
  32. 138
  33. 54
  34. 151
  35. 385
  36. 467
  37. 975
  38. 254
  39. 917
  40. 185

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