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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 168 · 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. 1.353 + 309 =
  2. 2.313 − 139 =
  3. 3.861 + ? = 977
  4. 4.? + 338 = 848
  5. 5.? + 344 = 952
  6. 6.540 + ? = 806
  7. 7.828 + 110 =
  8. 8.310 − 107 =
  9. 9.A train has 431 people in the front coaches and 435 people in the back coaches. How many people are on the train?
  10. 10.414 − ? = 299
  11. 11.349 − ? = 22
  12. 12.422 − ? = 307
  13. 13.383 + ? = 730
  14. 14.895 − 162 =
  15. 15.241 − 103 =
  16. 16.A train has 546 people in the front coaches and 374 people in the back coaches. How many people are on the train?
  17. 17.252 − 184 =
  18. 18.760 + 128 =
  19. 19.553 − 526 =
  20. 20.A train has 445 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  21. 21.573 − 286 =
  22. 22.215 + 270 =
  23. 23.221 − 151 =
  24. 24.330 − 284 =
  25. 25.760 + 176 =
  26. 26.A train has 516 people in the front coaches and 452 people in the back coaches. How many people are on the train?
  27. 27.A train has 117 people in the front coaches and 527 people in the back coaches. How many people are on the train?
  28. 28.A school has 363 children. 209 of them are girls. How many boys are there?
  29. 29.870 + 106 =
  30. 30.740 + 106 =
  31. 31.805 + 173 =
  32. 32.357 + 157 =
  33. 33.877 + 104 =
  34. 34.540 − ? = 110
  35. 35.683 + 258 =
  36. 36.A train has 550 people in the front coaches and 435 people in the back coaches. How many people are on the train?
  37. 37.360 − 193 =
  38. 38.847 − ? = 13
  39. 39.A school has 361 children. 159 of them are girls. How many boys are there?
  40. 40.A train has 220 people in the front coaches and 179 people in the back coaches. How many people are on the train?

Answer key

  1. 662
  2. 174
  3. 116
  4. 510
  5. 608
  6. 266
  7. 938
  8. 203
  9. 866
  10. 115
  11. 327
  12. 115
  13. 347
  14. 733
  15. 138
  16. 920
  17. 68
  18. 888
  19. 27
  20. 556
  21. 287
  22. 485
  23. 70
  24. 46
  25. 936
  26. 968
  27. 644
  28. 154
  29. 976
  30. 846
  31. 978
  32. 514
  33. 981
  34. 430
  35. 941
  36. 985
  37. 167
  38. 834
  39. 202
  40. 399

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