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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 588 · 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 491 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  2. 2.648 + 110 =
  3. 3.580 + 408 =
  4. 4.A train has 840 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  5. 5.? − 206 = 292
  6. 6.? + 787 = 979
  7. 7.856 − 785 =
  8. 8.960 − 863 =
  9. 9.650 + 110 =
  10. 10.A school has 357 children. 246 of them are girls. How many boys are there?
  11. 11.784 + 132 =
  12. 12.A train has 139 people in the front coaches and 481 people in the back coaches. How many people are on the train?
  13. 13.A train has 746 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  14. 14.671 − 193 =
  15. 15.A train has 152 people in the front coaches and 347 people in the back coaches. How many people are on the train?
  16. 16.810 − 114 =
  17. 17.A school has 242 children. 105 of them are girls. How many boys are there?
  18. 18.120 + 125 =
  19. 19.753 + ? = 870
  20. 20.A school has 990 children. 110 of them are girls. How many boys are there?
  21. 21.A train has 605 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  22. 22.837 − 174 =
  23. 23.? + 142 = 909
  24. 24.? + 874 = 980
  25. 25.? + 237 = 585
  26. 26.563 + 189 =
  27. 27.665 + 206 =
  28. 28.? + 875 = 994
  29. 29.A school has 877 children. 379 of them are girls. How many boys are there?
  30. 30.A train has 425 people in the front coaches and 508 people in the back coaches. How many people are on the train?
  31. 31.A school has 801 children. 342 of them are girls. How many boys are there?
  32. 32.802 + 154 =
  33. 33.349 + 425 =
  34. 34.488 − ? = 70
  35. 35.? + 142 = 956
  36. 36.517 − ? = 134
  37. 37.654 + 244 =
  38. 38.195 + 481 =
  39. 39.? + 825 = 946
  40. 40.572 + ? = 741

Answer key

  1. 620
  2. 758
  3. 988
  4. 973
  5. 498
  6. 192
  7. 71
  8. 97
  9. 760
  10. 111
  11. 916
  12. 620
  13. 925
  14. 478
  15. 499
  16. 696
  17. 137
  18. 245
  19. 117
  20. 880
  21. 775
  22. 663
  23. 767
  24. 106
  25. 348
  26. 752
  27. 871
  28. 119
  29. 498
  30. 933
  31. 459
  32. 956
  33. 774
  34. 418
  35. 814
  36. 383
  37. 898
  38. 676
  39. 121
  40. 169

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