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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 202 · 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.? + 779 = 935
  2. 2.500 + 236 =
  3. 3.A train has 352 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  4. 4.A school has 587 children. 229 of them are girls. How many boys are there?
  5. 5.A school has 755 children. 636 of them are girls. How many boys are there?
  6. 6.A school has 565 children. 513 of them are girls. How many boys are there?
  7. 7.400 − 399 =
  8. 8.216 − 138 =
  9. 9.290 − ? = 10
  10. 10.142 + 251 =
  11. 11.262 + ? = 973
  12. 12.576 − 347 =
  13. 13.467 − 364 =
  14. 14.A train has 809 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  15. 15.879 + 118 =
  16. 16.134 + ? = 516
  17. 17.A train has 674 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  18. 18.743 + 159 =
  19. 19.327 + ? = 857
  20. 20.A train has 842 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  21. 21.675 + 181 =
  22. 22.357 − 214 =
  23. 23.845 − 224 =
  24. 24.403 + 191 =
  25. 25.796 − 513 =
  26. 26.A train has 827 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  27. 27.246 − 113 =
  28. 28.A train has 834 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  29. 29.A school has 988 children. 380 of them are girls. How many boys are there?
  30. 30.A school has 442 children. 214 of them are girls. How many boys are there?
  31. 31.756 − 175 =
  32. 32.A school has 540 children. 161 of them are girls. How many boys are there?
  33. 33.A school has 334 children. 281 of them are girls. How many boys are there?
  34. 34.853 + 139 =
  35. 35.A school has 888 children. 805 of them are girls. How many boys are there?
  36. 36.284 − 104 =
  37. 37.451 − ? = 90
  38. 38.A school has 857 children. 387 of them are girls. How many boys are there?
  39. 39.A train has 675 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  40. 40.870 − 407 =

Answer key

  1. 156
  2. 736
  3. 620
  4. 358
  5. 119
  6. 52
  7. 1
  8. 78
  9. 280
  10. 393
  11. 711
  12. 229
  13. 103
  14. 997
  15. 997
  16. 382
  17. 789
  18. 902
  19. 530
  20. 998
  21. 856
  22. 143
  23. 621
  24. 594
  25. 283
  26. 939
  27. 133
  28. 990
  29. 608
  30. 228
  31. 581
  32. 379
  33. 53
  34. 992
  35. 83
  36. 180
  37. 361
  38. 470
  39. 926
  40. 463

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