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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 735 · 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 843 children. 329 of them are girls. How many boys are there?
  2. 2.739 + 140 =
  3. 3.A train has 303 people in the front coaches and 696 people in the back coaches. How many people are on the train?
  4. 4.A train has 332 people in the front coaches and 627 people in the back coaches. How many people are on the train?
  5. 5.977 − 538 =
  6. 6.327 + 496 =
  7. 7.669 − 577 =
  8. 8.A train has 873 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  9. 9.348 − 164 =
  10. 10.A school has 631 children. 584 of them are girls. How many boys are there?
  11. 11.? − 140 = 154
  12. 12.153 + 840 =
  13. 13.? + 775 = 945
  14. 14.293 + ? = 412
  15. 15.A school has 318 children. 271 of them are girls. How many boys are there?
  16. 16.935 − 880 =
  17. 17.250 + 370 =
  18. 18.538 + ? = 764
  19. 19.A school has 912 children. 321 of them are girls. How many boys are there?
  20. 20.273 − 261 =
  21. 21.A train has 284 people in the front coaches and 654 people in the back coaches. How many people are on the train?
  22. 22.261 − 173 =
  23. 23.A school has 555 children. 164 of them are girls. How many boys are there?
  24. 24.? − 625 = 265
  25. 25.138 + 809 =
  26. 26.746 − 495 =
  27. 27.573 − 253 =
  28. 28.? + 407 = 666
  29. 29.A train has 865 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  30. 30.217 + ? = 440
  31. 31.A train has 595 people in the front coaches and 323 people in the back coaches. How many people are on the train?
  32. 32.985 − ? = 479
  33. 33.334 − 272 =
  34. 34.A train has 169 people in the front coaches and 520 people in the back coaches. How many people are on the train?
  35. 35.? − 127 = 92
  36. 36.446 + ? = 937
  37. 37.? − 537 = 226
  38. 38.A school has 655 children. 196 of them are girls. How many boys are there?
  39. 39.A school has 795 children. 203 of them are girls. How many boys are there?
  40. 40.617 − 150 =

Answer key

  1. 514
  2. 879
  3. 999
  4. 959
  5. 439
  6. 823
  7. 92
  8. 989
  9. 184
  10. 47
  11. 294
  12. 993
  13. 170
  14. 119
  15. 47
  16. 55
  17. 620
  18. 226
  19. 591
  20. 12
  21. 938
  22. 88
  23. 391
  24. 890
  25. 947
  26. 251
  27. 320
  28. 259
  29. 974
  30. 223
  31. 918
  32. 506
  33. 62
  34. 689
  35. 219
  36. 491
  37. 763
  38. 459
  39. 592
  40. 467

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