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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 628 · 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 983 children. 169 of them are girls. How many boys are there?
  2. 2.? + 520 = 819
  3. 3.831 + 104 =
  4. 4.A school has 593 children. 583 of them are girls. How many boys are there?
  5. 5.? + 197 = 577
  6. 6.538 + 337 =
  7. 7.895 − ? = 546
  8. 8.751 + 107 =
  9. 9.A school has 924 children. 876 of them are girls. How many boys are there?
  10. 10.454 − ? = 307
  11. 11.A school has 925 children. 388 of them are girls. How many boys are there?
  12. 12.667 + 224 =
  13. 13.? + 549 = 675
  14. 14.A train has 249 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  15. 15.824 − ? = 526
  16. 16.764 − 523 =
  17. 17.220 − 180 =
  18. 18.A train has 192 people in the front coaches and 595 people in the back coaches. How many people are on the train?
  19. 19.? − 117 = 658
  20. 20.A school has 569 children. 435 of them are girls. How many boys are there?
  21. 21.A train has 613 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  22. 22.? + 399 = 956
  23. 23.? + 327 = 477
  24. 24.463 + 128 =
  25. 25.A train has 843 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  26. 26.A train has 325 people in the front coaches and 619 people in the back coaches. How many people are on the train?
  27. 27.A train has 132 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  28. 28.A school has 274 children. 234 of them are girls. How many boys are there?
  29. 29.A train has 324 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  30. 30.878 + 110 =
  31. 31.A school has 592 children. 241 of them are girls. How many boys are there?
  32. 32.A train has 307 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  33. 33.391 − 107 =
  34. 34.A train has 510 people in the front coaches and 337 people in the back coaches. How many people are on the train?
  35. 35.969 − 742 =
  36. 36.242 + 722 =
  37. 37.961 − ? = 617
  38. 38.A train has 761 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  39. 39.480 − 200 =
  40. 40.215 − ? = 65

Answer key

  1. 814
  2. 299
  3. 935
  4. 10
  5. 380
  6. 875
  7. 349
  8. 858
  9. 48
  10. 147
  11. 537
  12. 891
  13. 126
  14. 358
  15. 298
  16. 241
  17. 40
  18. 787
  19. 775
  20. 134
  21. 770
  22. 557
  23. 150
  24. 591
  25. 952
  26. 944
  27. 328
  28. 40
  29. 572
  30. 988
  31. 351
  32. 430
  33. 284
  34. 847
  35. 227
  36. 964
  37. 344
  38. 996
  39. 280
  40. 150

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