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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 453 · 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. 1.410 + ? = 650
  2. 2.392 + ? = 545
  3. 3.A train has 432 people in the front coaches and 470 people in the back coaches. How many people are on the train?
  4. 4.A school has 308 children. 118 of them are girls. How many boys are there?
  5. 5.319 − 265 =
  6. 6.A school has 227 children. 165 of them are girls. How many boys are there?
  7. 7.331 − ? = 55
  8. 8.446 + ? = 619
  9. 9.A train has 581 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  10. 10.879 + 103 =
  11. 11.112 + ? = 786
  12. 12.964 − 881 =
  13. 13.299 + 435 =
  14. 14.618 − ? = 425
  15. 15.A school has 280 children. 173 of them are girls. How many boys are there?
  16. 16.A school has 214 children. 200 of them are girls. How many boys are there?
  17. 17.389 + 277 =
  18. 18.237 − 120 =
  19. 19.285 + ? = 819
  20. 20.? − 596 = 150
  21. 21.395 − ? = 25
  22. 22.? − 410 = 408
  23. 23.A train has 839 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  24. 24.470 − ? = 39
  25. 25.557 + 124 =
  26. 26.? − 499 = 243
  27. 27.671 − 607 =
  28. 28.? − 694 = 52
  29. 29.A train has 371 people in the front coaches and 475 people in the back coaches. How many people are on the train?
  30. 30.145 + 392 =
  31. 31.215 + 634 =
  32. 32.886 − ? = 586
  33. 33.? + 519 = 864
  34. 34.617 + 252 =
  35. 35.434 + 410 =
  36. 36.308 − ? = 141
  37. 37.279 − 273 =
  38. 38.A train has 163 people in the front coaches and 736 people in the back coaches. How many people are on the train?
  39. 39.A school has 756 children. 603 of them are girls. How many boys are there?
  40. 40.A school has 344 children. 134 of them are girls. How many boys are there?

Answer key

  1. 240
  2. 153
  3. 902
  4. 190
  5. 54
  6. 62
  7. 276
  8. 173
  9. 774
  10. 982
  11. 674
  12. 83
  13. 734
  14. 193
  15. 107
  16. 14
  17. 666
  18. 117
  19. 534
  20. 746
  21. 370
  22. 818
  23. 979
  24. 431
  25. 681
  26. 742
  27. 64
  28. 746
  29. 846
  30. 537
  31. 849
  32. 300
  33. 345
  34. 869
  35. 844
  36. 167
  37. 6
  38. 899
  39. 153
  40. 210

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