← 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 926 · 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. 1.871 − ? = 237
  2. 2.884 + ? = 984
  3. 3.407 − ? = 49
  4. 4.405 − 190 =
  5. 5.846 − 586 =
  6. 6.560 − ? = 200
  7. 7.919 − 782 =
  8. 8.835 + 155 =
  9. 9.A school has 721 children. 597 of them are girls. How many boys are there?
  10. 10.? + 412 = 958
  11. 11.211 − ? = 95
  12. 12.A school has 346 children. 332 of them are girls. How many boys are there?
  13. 13.227 + 492 =
  14. 14.A school has 686 children. 483 of them are girls. How many boys are there?
  15. 15.? + 214 = 908
  16. 16.442 + 319 =
  17. 17.197 + ? = 409
  18. 18.392 − 288 =
  19. 19.? − 357 = 455
  20. 20.404 − 316 =
  21. 21.? − 307 = 281
  22. 22.? + 237 = 811
  23. 23.A school has 587 children. 228 of them are girls. How many boys are there?
  24. 24.863 + 132 =
  25. 25.A school has 521 children. 285 of them are girls. How many boys are there?
  26. 26.941 − 349 =
  27. 27.868 + 117 =
  28. 28.A train has 442 people in the front coaches and 477 people in the back coaches. How many people are on the train?
  29. 29.A train has 683 people in the front coaches and 241 people in the back coaches. How many people are on the train?
  30. 30.? + 531 = 738
  31. 31.780 + 113 =
  32. 32.? − 842 = 13
  33. 33.762 + ? = 998
  34. 34.637 − ? = 459
  35. 35.A train has 209 people in the front coaches and 323 people in the back coaches. How many people are on the train?
  36. 36.427 + ? = 927
  37. 37.803 + 132 =
  38. 38.567 + ? = 867
  39. 39.A school has 670 children. 110 of them are girls. How many boys are there?
  40. 40.A school has 611 children. 122 of them are girls. How many boys are there?

Answer key

  1. 634
  2. 100
  3. 358
  4. 215
  5. 260
  6. 360
  7. 137
  8. 990
  9. 124
  10. 546
  11. 116
  12. 14
  13. 719
  14. 203
  15. 694
  16. 761
  17. 212
  18. 104
  19. 812
  20. 88
  21. 588
  22. 574
  23. 359
  24. 995
  25. 236
  26. 592
  27. 985
  28. 919
  29. 924
  30. 207
  31. 893
  32. 855
  33. 236
  34. 178
  35. 532
  36. 500
  37. 935
  38. 300
  39. 560
  40. 489

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