← 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 316 · 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. 1.291 + 194 =
  2. 2.A school has 461 children. 416 of them are girls. How many boys are there?
  3. 3.629 − 448 =
  4. 4.A train has 165 people in the front coaches and 602 people in the back coaches. How many people are on the train?
  5. 5.A school has 755 children. 602 of them are girls. How many boys are there?
  6. 6.940 − ? = 606
  7. 7.A train has 749 people in the front coaches and 228 people in the back coaches. How many people are on the train?
  8. 8.A school has 782 children. 535 of them are girls. How many boys are there?
  9. 9.A school has 945 children. 913 of them are girls. How many boys are there?
  10. 10.210 + ? = 915
  11. 11.723 + 113 =
  12. 12.475 − ? = 348
  13. 13.465 − 253 =
  14. 14.204 + 717 =
  15. 15.119 + 286 =
  16. 16.893 + ? = 995
  17. 17.557 − 351 =
  18. 18.? + 287 = 737
  19. 19.233 − ? = 11
  20. 20.A school has 304 children. 241 of them are girls. How many boys are there?
  21. 21.171 + 319 =
  22. 22.632 + 337 =
  23. 23.468 − 285 =
  24. 24.A train has 616 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  25. 25.858 − 672 =
  26. 26.390 − 140 =
  27. 27.A train has 478 people in the front coaches and 189 people in the back coaches. How many people are on the train?
  28. 28.763 − ? = 199
  29. 29.387 + 355 =
  30. 30.222 − 181 =
  31. 31.585 + 197 =
  32. 32.A school has 404 children. 183 of them are girls. How many boys are there?
  33. 33.664 + ? = 831
  34. 34.A train has 441 people in the front coaches and 500 people in the back coaches. How many people are on the train?
  35. 35.705 − ? = 573
  36. 36.A train has 838 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  37. 37.757 − ? = 596
  38. 38.857 − 709 =
  39. 39.A school has 996 children. 301 of them are girls. How many boys are there?
  40. 40.A school has 626 children. 215 of them are girls. How many boys are there?

Answer key

  1. 485
  2. 45
  3. 181
  4. 767
  5. 153
  6. 334
  7. 977
  8. 247
  9. 32
  10. 705
  11. 836
  12. 127
  13. 212
  14. 921
  15. 405
  16. 102
  17. 206
  18. 450
  19. 222
  20. 63
  21. 490
  22. 969
  23. 183
  24. 847
  25. 186
  26. 250
  27. 667
  28. 564
  29. 742
  30. 41
  31. 782
  32. 221
  33. 167
  34. 941
  35. 132
  36. 964
  37. 161
  38. 148
  39. 695
  40. 411

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