← 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 539 · 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. 1.936 − 446 =
  2. 2.A train has 122 people in the front coaches and 641 people in the back coaches. How many people are on the train?
  3. 3.? + 780 = 961
  4. 4.894 − 174 =
  5. 5.? − 192 = 87
  6. 6.? − 181 = 235
  7. 7.276 − 198 =
  8. 8.997 − 432 =
  9. 9.443 + ? = 646
  10. 10.A train has 187 people in the front coaches and 294 people in the back coaches. How many people are on the train?
  11. 11.? + 242 = 380
  12. 12.A train has 194 people in the front coaches and 715 people in the back coaches. How many people are on the train?
  13. 13.? + 678 = 866
  14. 14.A school has 970 children. 565 of them are girls. How many boys are there?
  15. 15.445 + ? = 800
  16. 16.201 − 153 =
  17. 17.A train has 402 people in the front coaches and 257 people in the back coaches. How many people are on the train?
  18. 18.664 + 185 =
  19. 19.632 − 147 =
  20. 20.611 − ? = 388
  21. 21.663 + 156 =
  22. 22.371 + 413 =
  23. 23.A school has 869 children. 283 of them are girls. How many boys are there?
  24. 24.375 − ? = 181
  25. 25.293 + 189 =
  26. 26.227 − ? = 37
  27. 27.A train has 889 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  28. 28.667 + 147 =
  29. 29.A train has 666 people in the front coaches and 165 people in the back coaches. How many people are on the train?
  30. 30.615 + ? = 973
  31. 31.401 − 283 =
  32. 32.384 − ? = 58
  33. 33.489 + 458 =
  34. 34.422 + ? = 790
  35. 35.592 + ? = 769
  36. 36.381 − 373 =
  37. 37.? + 204 = 409
  38. 38.949 − 143 =
  39. 39.? − 449 = 22
  40. 40.A school has 994 children. 780 of them are girls. How many boys are there?

Answer key

  1. 490
  2. 763
  3. 181
  4. 720
  5. 279
  6. 416
  7. 78
  8. 565
  9. 203
  10. 481
  11. 138
  12. 909
  13. 188
  14. 405
  15. 355
  16. 48
  17. 659
  18. 849
  19. 485
  20. 223
  21. 819
  22. 784
  23. 586
  24. 194
  25. 482
  26. 190
  27. 998
  28. 814
  29. 831
  30. 358
  31. 118
  32. 326
  33. 947
  34. 368
  35. 177
  36. 8
  37. 205
  38. 806
  39. 471
  40. 214

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