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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 191 · 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. 1.544 + 195 =
  2. 2.740 + 255 =
  3. 3.A school has 721 children. 177 of them are girls. How many boys are there?
  4. 4.A train has 707 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  5. 5.699 − 101 =
  6. 6.573 − 179 =
  7. 7.595 − 233 =
  8. 8.? + 217 = 970
  9. 9.759 + 191 =
  10. 10.597 + ? = 783
  11. 11.504 + 481 =
  12. 12.480 − ? = 5
  13. 13.A train has 887 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  14. 14.? + 282 = 742
  15. 15.722 − 157 =
  16. 16.951 − 530 =
  17. 17.316 + 113 =
  18. 18.A train has 822 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  19. 19.? + 820 = 968
  20. 20.A school has 554 children. 526 of them are girls. How many boys are there?
  21. 21.177 + 277 =
  22. 22.A school has 878 children. 100 of them are girls. How many boys are there?
  23. 23.929 − 206 =
  24. 24.213 + 713 =
  25. 25.934 − 479 =
  26. 26.904 − 183 =
  27. 27.A train has 408 people in the front coaches and 208 people in the back coaches. How many people are on the train?
  28. 28.136 + 505 =
  29. 29.? + 571 = 725
  30. 30.A train has 182 people in the front coaches and 757 people in the back coaches. How many people are on the train?
  31. 31.A train has 181 people in the front coaches and 479 people in the back coaches. How many people are on the train?
  32. 32.A school has 853 children. 397 of them are girls. How many boys are there?
  33. 33.340 − 213 =
  34. 34.A train has 827 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  35. 35.A school has 465 children. 282 of them are girls. How many boys are there?
  36. 36.884 − 424 =
  37. 37.? − 246 = 132
  38. 38.229 + ? = 717
  39. 39.A train has 587 people in the front coaches and 327 people in the back coaches. How many people are on the train?
  40. 40.818 − 602 =

Answer key

  1. 739
  2. 995
  3. 544
  4. 941
  5. 598
  6. 394
  7. 362
  8. 753
  9. 950
  10. 186
  11. 985
  12. 475
  13. 993
  14. 460
  15. 565
  16. 421
  17. 429
  18. 985
  19. 148
  20. 28
  21. 454
  22. 778
  23. 723
  24. 926
  25. 455
  26. 721
  27. 616
  28. 641
  29. 154
  30. 939
  31. 660
  32. 456
  33. 127
  34. 981
  35. 183
  36. 460
  37. 378
  38. 488
  39. 914
  40. 216

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