← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 128 · 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 495 people in the front coaches and 490 people in the back coaches. How many people are on the train?
  2. 2.A train has 852 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  3. 3.927 − 710 =
  4. 4.260 − ? = 148
  5. 5.808 + 170 =
  6. 6.779 + 148 =
  7. 7.205 + 119 =
  8. 8.628 − 338 =
  9. 9.A school has 905 children. 169 of them are girls. How many boys are there?
  10. 10.603 − 461 =
  11. 11.395 − 320 =
  12. 12.? + 340 = 741
  13. 13.651 + 146 =
  14. 14.A school has 269 children. 198 of them are girls. How many boys are there?
  15. 15.592 − ? = 363
  16. 16.245 + 129 =
  17. 17.A train has 851 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  18. 18.? + 810 = 980
  19. 19.? + 659 = 941
  20. 20.423 − ? = 211
  21. 21.A train has 844 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  22. 22.A school has 410 children. 101 of them are girls. How many boys are there?
  23. 23.531 + ? = 733
  24. 24.531 − 430 =
  25. 25.294 + 614 =
  26. 26.A school has 346 children. 265 of them are girls. How many boys are there?
  27. 27.484 + 497 =
  28. 28.281 + 390 =
  29. 29.524 − 204 =
  30. 30.640 − 493 =
  31. 31.A school has 876 children. 353 of them are girls. How many boys are there?
  32. 32.939 − 541 =
  33. 33.688 − 623 =
  34. 34.232 − 211 =
  35. 35.401 − 366 =
  36. 36.680 + 137 =
  37. 37.? − 160 = 65
  38. 38.? + 554 = 773
  39. 39.788 − 138 =
  40. 40.A train has 443 people in the front coaches and 447 people in the back coaches. How many people are on the train?

Answer key

  1. 985
  2. 972
  3. 217
  4. 112
  5. 978
  6. 927
  7. 324
  8. 290
  9. 736
  10. 142
  11. 75
  12. 401
  13. 797
  14. 71
  15. 229
  16. 374
  17. 962
  18. 170
  19. 282
  20. 212
  21. 944
  22. 309
  23. 202
  24. 101
  25. 908
  26. 81
  27. 981
  28. 671
  29. 320
  30. 147
  31. 523
  32. 398
  33. 65
  34. 21
  35. 35
  36. 817
  37. 225
  38. 219
  39. 650
  40. 890

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets