← 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 356 · 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. 1.229 + 177 =
  2. 2.969 − 567 =
  3. 3.A school has 820 children. 718 of them are girls. How many boys are there?
  4. 4.575 + ? = 885
  5. 5.? − 198 = 38
  6. 6.838 + ? = 962
  7. 7.? − 444 = 141
  8. 8.A school has 868 children. 718 of them are girls. How many boys are there?
  9. 9.? + 360 = 903
  10. 10.232 + 634 =
  11. 11.A school has 361 children. 112 of them are girls. How many boys are there?
  12. 12.? + 509 = 983
  13. 13.418 − 400 =
  14. 14.585 + 105 =
  15. 15.790 − ? = 10
  16. 16.A train has 774 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  17. 17.679 + ? = 999
  18. 18.543 + 185 =
  19. 19.445 + 423 =
  20. 20.962 − 950 =
  21. 21.964 − 315 =
  22. 22.A train has 684 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  23. 23.901 − 413 =
  24. 24.679 + 211 =
  25. 25.A school has 935 children. 327 of them are girls. How many boys are there?
  26. 26.741 + 155 =
  27. 27.A train has 550 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  28. 28.119 + ? = 881
  29. 29.344 − 142 =
  30. 30.372 − 358 =
  31. 31.A train has 244 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  32. 32.248 + 572 =
  33. 33.645 + 181 =
  34. 34.? − 262 = 374
  35. 35.A train has 633 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  36. 36.715 + ? = 965
  37. 37.521 + ? = 996
  38. 38.650 + 210 =
  39. 39.770 + 218 =
  40. 40.A train has 848 people in the front coaches and 135 people in the back coaches. How many people are on the train?

Answer key

  1. 406
  2. 402
  3. 102
  4. 310
  5. 236
  6. 124
  7. 585
  8. 150
  9. 543
  10. 866
  11. 249
  12. 474
  13. 18
  14. 690
  15. 780
  16. 966
  17. 320
  18. 728
  19. 868
  20. 12
  21. 649
  22. 833
  23. 488
  24. 890
  25. 608
  26. 896
  27. 885
  28. 762
  29. 202
  30. 14
  31. 506
  32. 820
  33. 826
  34. 636
  35. 733
  36. 250
  37. 475
  38. 860
  39. 988
  40. 983

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