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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 614 · 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 school has 924 children. 100 of them are girls. How many boys are there?
  2. 2.A train has 342 people in the front coaches and 215 people in the back coaches. How many people are on the train?
  3. 3.A school has 238 children. 150 of them are girls. How many boys are there?
  4. 4.233 + ? = 630
  5. 5.867 + 119 =
  6. 6.? − 173 = 146
  7. 7.246 + 207 =
  8. 8.300 − ? = 38
  9. 9.310 + 305 =
  10. 10.? + 112 = 290
  11. 11.A school has 746 children. 656 of them are girls. How many boys are there?
  12. 12.795 + ? = 914
  13. 13.A school has 520 children. 510 of them are girls. How many boys are there?
  14. 14.A train has 109 people in the front coaches and 293 people in the back coaches. How many people are on the train?
  15. 15.A train has 297 people in the front coaches and 458 people in the back coaches. How many people are on the train?
  16. 16.669 − ? = 403
  17. 17.? + 783 = 983
  18. 18.311 + 461 =
  19. 19.981 − ? = 732
  20. 20.? + 194 = 828
  21. 21.A school has 328 children. 264 of them are girls. How many boys are there?
  22. 22.? − 450 = 47
  23. 23.304 + 459 =
  24. 24.863 + 103 =
  25. 25.481 + 115 =
  26. 26.670 + 198 =
  27. 27.? + 219 = 816
  28. 28.234 + 510 =
  29. 29.A train has 771 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  30. 30.808 − 600 =
  31. 31.559 − 104 =
  32. 32.602 − 339 =
  33. 33.117 + ? = 840
  34. 34.A school has 628 children. 528 of them are girls. How many boys are there?
  35. 35.A train has 806 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  36. 36.759 − ? = 58
  37. 37.375 − 101 =
  38. 38.? − 256 = 697
  39. 39.? − 195 = 100
  40. 40.A school has 645 children. 287 of them are girls. How many boys are there?

Answer key

  1. 824
  2. 557
  3. 88
  4. 397
  5. 986
  6. 319
  7. 453
  8. 262
  9. 615
  10. 178
  11. 90
  12. 119
  13. 10
  14. 402
  15. 755
  16. 266
  17. 200
  18. 772
  19. 249
  20. 634
  21. 64
  22. 497
  23. 763
  24. 966
  25. 596
  26. 868
  27. 597
  28. 744
  29. 878
  30. 208
  31. 455
  32. 263
  33. 723
  34. 100
  35. 931
  36. 701
  37. 274
  38. 953
  39. 295
  40. 358

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