← 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 932 · 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. 1.673 + ? = 819
  2. 2.A school has 621 children. 573 of them are girls. How many boys are there?
  3. 3.500 + 458 =
  4. 4.A school has 872 children. 723 of them are girls. How many boys are there?
  5. 5.A train has 172 people in the front coaches and 345 people in the back coaches. How many people are on the train?
  6. 6.414 + ? = 908
  7. 7.549 − ? = 96
  8. 8.A train has 256 people in the front coaches and 507 people in the back coaches. How many people are on the train?
  9. 9.443 + ? = 646
  10. 10.A train has 762 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  11. 11.? − 297 = 688
  12. 12.? − 150 = 212
  13. 13.448 − 268 =
  14. 14.650 − 286 =
  15. 15.? + 259 = 475
  16. 16.325 − 168 =
  17. 17.732 + 130 =
  18. 18.? + 864 = 993
  19. 19.A school has 894 children. 440 of them are girls. How many boys are there?
  20. 20.? + 126 = 804
  21. 21.? − 108 = 282
  22. 22.A school has 979 children. 688 of them are girls. How many boys are there?
  23. 23.343 + 180 =
  24. 24.733 − 123 =
  25. 25.283 − ? = 75
  26. 26.325 − 149 =
  27. 27.A train has 194 people in the front coaches and 499 people in the back coaches. How many people are on the train?
  28. 28.A train has 498 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  29. 29.885 − 257 =
  30. 30.579 + 182 =
  31. 31.343 − ? = 61
  32. 32.A train has 369 people in the front coaches and 555 people in the back coaches. How many people are on the train?
  33. 33.590 + ? = 747
  34. 34.? + 755 = 952
  35. 35.369 − ? = 79
  36. 36.380 − ? = 13
  37. 37.853 + 112 =
  38. 38.274 − 117 =
  39. 39.689 + ? = 941
  40. 40.A train has 809 people in the front coaches and 125 people in the back coaches. How many people are on the train?

Answer key

  1. 146
  2. 48
  3. 958
  4. 149
  5. 517
  6. 494
  7. 453
  8. 763
  9. 203
  10. 868
  11. 985
  12. 362
  13. 180
  14. 364
  15. 216
  16. 157
  17. 862
  18. 129
  19. 454
  20. 678
  21. 390
  22. 291
  23. 523
  24. 610
  25. 208
  26. 176
  27. 693
  28. 707
  29. 628
  30. 761
  31. 282
  32. 924
  33. 157
  34. 197
  35. 290
  36. 367
  37. 965
  38. 157
  39. 252
  40. 934

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