← 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 150 · 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 train has 136 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  2. 2.? + 228 = 617
  3. 3.A school has 784 children. 397 of them are girls. How many boys are there?
  4. 4.A school has 746 children. 228 of them are girls. How many boys are there?
  5. 5.184 + ? = 305
  6. 6.238 − 132 =
  7. 7.897 + ? = 998
  8. 8.A school has 415 children. 163 of them are girls. How many boys are there?
  9. 9.792 + ? = 922
  10. 10.130 + 402 =
  11. 11.? + 293 = 506
  12. 12.315 − 137 =
  13. 13.801 + 114 =
  14. 14.607 + 221 =
  15. 15.A train has 178 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  16. 16.647 + 321 =
  17. 17.673 + 100 =
  18. 18.? − 130 = 228
  19. 19.851 − 603 =
  20. 20.494 − 467 =
  21. 21.416 − 215 =
  22. 22.429 − 103 =
  23. 23.A train has 419 people in the front coaches and 405 people in the back coaches. How many people are on the train?
  24. 24.317 + 247 =
  25. 25.A school has 412 children. 131 of them are girls. How many boys are there?
  26. 26.209 + 234 =
  27. 27.A train has 823 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  28. 28.A school has 867 children. 296 of them are girls. How many boys are there?
  29. 29.806 + ? = 929
  30. 30.608 + 336 =
  31. 31.A train has 785 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  32. 32.331 − 311 =
  33. 33.? + 112 = 270
  34. 34.? − 277 = 388
  35. 35.836 + 144 =
  36. 36.A train has 419 people in the front coaches and 228 people in the back coaches. How many people are on the train?
  37. 37.A school has 402 children. 243 of them are girls. How many boys are there?
  38. 38.535 − 156 =
  39. 39.A train has 104 people in the front coaches and 487 people in the back coaches. How many people are on the train?
  40. 40.338 − ? = 121

Answer key

  1. 398
  2. 389
  3. 387
  4. 518
  5. 121
  6. 106
  7. 101
  8. 252
  9. 130
  10. 532
  11. 213
  12. 178
  13. 915
  14. 828
  15. 383
  16. 968
  17. 773
  18. 358
  19. 248
  20. 27
  21. 201
  22. 326
  23. 824
  24. 564
  25. 281
  26. 443
  27. 938
  28. 571
  29. 123
  30. 944
  31. 889
  32. 20
  33. 158
  34. 665
  35. 980
  36. 647
  37. 159
  38. 379
  39. 591
  40. 217

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