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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 13 · 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 907 children. 484 of them are girls. How many boys are there?
  2. 2.A school has 307 children. 108 of them are girls. How many boys are there?
  3. 3.729 + 264 =
  4. 4.256 + ? = 747
  5. 5.721 + 278 =
  6. 6.? + 427 = 735
  7. 7.825 + 101 =
  8. 8.296 − ? = 179
  9. 9.432 + ? = 982
  10. 10.A train has 304 people in the front coaches and 565 people in the back coaches. How many people are on the train?
  11. 11.A school has 572 children. 407 of them are girls. How many boys are there?
  12. 12.874 + 117 =
  13. 13.360 + 170 =
  14. 14.A school has 554 children. 485 of them are girls. How many boys are there?
  15. 15.272 + 126 =
  16. 16.317 − 194 =
  17. 17.A train has 885 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  18. 18.A train has 140 people in the front coaches and 646 people in the back coaches. How many people are on the train?
  19. 19.851 − ? = 470
  20. 20.371 − ? = 211
  21. 21.203 − 110 =
  22. 22.A school has 672 children. 518 of them are girls. How many boys are there?
  23. 23.? + 290 = 893
  24. 24.740 − ? = 525
  25. 25.A train has 559 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  26. 26.A school has 956 children. 306 of them are girls. How many boys are there?
  27. 27.980 − 190 =
  28. 28.A school has 640 children. 545 of them are girls. How many boys are there?
  29. 29.339 + 594 =
  30. 30.132 + 282 =
  31. 31.A train has 393 people in the front coaches and 394 people in the back coaches. How many people are on the train?
  32. 32.A school has 679 children. 394 of them are girls. How many boys are there?
  33. 33.A train has 884 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  34. 34.911 − ? = 490
  35. 35.A school has 419 children. 388 of them are girls. How many boys are there?
  36. 36.260 + ? = 508
  37. 37.A train has 256 people in the front coaches and 642 people in the back coaches. How many people are on the train?
  38. 38.339 − ? = 179
  39. 39.A train has 189 people in the front coaches and 617 people in the back coaches. How many people are on the train?
  40. 40.632 + ? = 990

Answer key

  1. 423
  2. 199
  3. 993
  4. 491
  5. 999
  6. 308
  7. 926
  8. 117
  9. 550
  10. 869
  11. 165
  12. 991
  13. 530
  14. 69
  15. 398
  16. 123
  17. 988
  18. 786
  19. 381
  20. 160
  21. 93
  22. 154
  23. 603
  24. 215
  25. 807
  26. 650
  27. 790
  28. 95
  29. 933
  30. 414
  31. 787
  32. 285
  33. 998
  34. 421
  35. 31
  36. 248
  37. 898
  38. 160
  39. 806
  40. 358

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