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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 374 · 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. 1.926 − ? = 605
  2. 2.228 − 108 =
  3. 3.189 + 694 =
  4. 4.238 − 107 =
  5. 5.652 − ? = 80
  6. 6.A train has 851 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  7. 7.642 − ? = 204
  8. 8.114 + 605 =
  9. 9.A train has 516 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  10. 10.976 − ? = 183
  11. 11.177 + ? = 888
  12. 12.? + 311 = 789
  13. 13.771 + 127 =
  14. 14.875 + ? = 981
  15. 15.A school has 485 children. 369 of them are girls. How many boys are there?
  16. 16.955 − 818 =
  17. 17.A train has 374 people in the front coaches and 338 people in the back coaches. How many people are on the train?
  18. 18.327 + 167 =
  19. 19.389 + ? = 735
  20. 20.A school has 937 children. 587 of them are girls. How many boys are there?
  21. 21.A train has 895 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  22. 22.545 − 380 =
  23. 23.? + 187 = 837
  24. 24.A train has 435 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  25. 25.484 − 428 =
  26. 26.279 − ? = 146
  27. 27.? − 427 = 529
  28. 28.979 − ? = 94
  29. 29.A train has 443 people in the front coaches and 415 people in the back coaches. How many people are on the train?
  30. 30.A train has 220 people in the front coaches and 281 people in the back coaches. How many people are on the train?
  31. 31.? − 115 = 481
  32. 32.740 + ? = 854
  33. 33.? + 166 = 394
  34. 34.472 + 325 =
  35. 35.693 + ? = 850
  36. 36.310 + 300 =
  37. 37.668 − 337 =
  38. 38.568 − 423 =
  39. 39.? − 177 = 145
  40. 40.355 + ? = 787

Answer key

  1. 321
  2. 120
  3. 883
  4. 131
  5. 572
  6. 962
  7. 438
  8. 719
  9. 618
  10. 793
  11. 711
  12. 478
  13. 898
  14. 106
  15. 116
  16. 137
  17. 712
  18. 494
  19. 346
  20. 350
  21. 997
  22. 165
  23. 650
  24. 551
  25. 56
  26. 133
  27. 956
  28. 885
  29. 858
  30. 501
  31. 596
  32. 114
  33. 228
  34. 797
  35. 157
  36. 610
  37. 331
  38. 145
  39. 322
  40. 432

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