← 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 278 · 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 school has 267 children. 151 of them are girls. How many boys are there?
  2. 2.587 + 293 =
  3. 3.A train has 211 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  4. 4.771 + 119 =
  5. 5.631 − 584 =
  6. 6.473 + ? = 621
  7. 7.A train has 105 people in the front coaches and 252 people in the back coaches. How many people are on the train?
  8. 8.272 + 702 =
  9. 9.263 + ? = 769
  10. 10.389 + 193 =
  11. 11.? − 341 = 57
  12. 12.315 + 548 =
  13. 13.? + 451 = 610
  14. 14.668 + ? = 988
  15. 15.A train has 229 people in the front coaches and 395 people in the back coaches. How many people are on the train?
  16. 16.411 + 417 =
  17. 17.218 − ? = 25
  18. 18.? − 525 = 74
  19. 19.562 + ? = 677
  20. 20.A train has 423 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  21. 21.729 − ? = 444
  22. 22.413 + ? = 636
  23. 23.791 − 178 =
  24. 24.? + 703 = 987
  25. 25.A train has 108 people in the front coaches and 866 people in the back coaches. How many people are on the train?
  26. 26.? + 899 = 999
  27. 27.A school has 204 children. 113 of them are girls. How many boys are there?
  28. 28.A school has 404 children. 183 of them are girls. How many boys are there?
  29. 29.880 + ? = 982
  30. 30.A school has 418 children. 128 of them are girls. How many boys are there?
  31. 31.? + 275 = 852
  32. 32.A train has 315 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  33. 33.297 − ? = 4
  34. 34.289 + ? = 539
  35. 35.A school has 388 children. 221 of them are girls. How many boys are there?
  36. 36.A train has 787 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  37. 37.233 + 411 =
  38. 38.A train has 490 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  39. 39.A school has 534 children. 194 of them are girls. How many boys are there?
  40. 40.A train has 307 people in the front coaches and 498 people in the back coaches. How many people are on the train?

Answer key

  1. 116
  2. 880
  3. 496
  4. 890
  5. 47
  6. 148
  7. 357
  8. 974
  9. 506
  10. 582
  11. 398
  12. 863
  13. 159
  14. 320
  15. 624
  16. 828
  17. 193
  18. 599
  19. 115
  20. 629
  21. 285
  22. 223
  23. 613
  24. 284
  25. 974
  26. 100
  27. 91
  28. 221
  29. 102
  30. 290
  31. 577
  32. 463
  33. 293
  34. 250
  35. 167
  36. 899
  37. 644
  38. 814
  39. 340
  40. 805

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