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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 680 · 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. 1.500 + 161 =
  2. 2.A school has 856 children. 375 of them are girls. How many boys are there?
  3. 3.A school has 552 children. 277 of them are girls. How many boys are there?
  4. 4.A school has 517 children. 349 of them are girls. How many boys are there?
  5. 5.A school has 831 children. 621 of them are girls. How many boys are there?
  6. 6.A train has 309 people in the front coaches and 439 people in the back coaches. How many people are on the train?
  7. 7.A train has 510 people in the front coaches and 259 people in the back coaches. How many people are on the train?
  8. 8.532 + 404 =
  9. 9.679 + 194 =
  10. 10.935 − 225 =
  11. 11.795 + ? = 977
  12. 12.A school has 419 children. 218 of them are girls. How many boys are there?
  13. 13.A train has 730 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  14. 14.A train has 495 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  15. 15.847 + 113 =
  16. 16.? + 649 = 759
  17. 17.907 − 213 =
  18. 18.218 + 326 =
  19. 19.548 − ? = 365
  20. 20.537 + 258 =
  21. 21.120 + 173 =
  22. 22.128 + ? = 331
  23. 23.183 + 554 =
  24. 24.760 − ? = 408
  25. 25.580 − ? = 181
  26. 26.510 + 385 =
  27. 27.333 + 438 =
  28. 28.? − 135 = 643
  29. 29.A train has 286 people in the front coaches and 681 people in the back coaches. How many people are on the train?
  30. 30.534 − 527 =
  31. 31.? + 406 = 572
  32. 32.702 − 393 =
  33. 33.499 + 375 =
  34. 34.213 − ? = 80
  35. 35.287 + 221 =
  36. 36.A train has 167 people in the front coaches and 464 people in the back coaches. How many people are on the train?
  37. 37.A train has 679 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  38. 38.521 + ? = 829
  39. 39.183 + 501 =
  40. 40.A train has 320 people in the front coaches and 386 people in the back coaches. How many people are on the train?

Answer key

  1. 661
  2. 481
  3. 275
  4. 168
  5. 210
  6. 748
  7. 769
  8. 936
  9. 873
  10. 710
  11. 182
  12. 201
  13. 868
  14. 730
  15. 960
  16. 110
  17. 694
  18. 544
  19. 183
  20. 795
  21. 293
  22. 203
  23. 737
  24. 352
  25. 399
  26. 895
  27. 771
  28. 778
  29. 967
  30. 7
  31. 166
  32. 309
  33. 874
  34. 133
  35. 508
  36. 631
  37. 812
  38. 308
  39. 684
  40. 706

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