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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 944 · 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 train has 804 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  2. 2.? − 310 = 6
  3. 3.? + 576 = 721
  4. 4.722 + 172 =
  5. 5.244 − ? = 80
  6. 6.A train has 418 people in the front coaches and 215 people in the back coaches. How many people are on the train?
  7. 7.A school has 628 children. 235 of them are girls. How many boys are there?
  8. 8.A school has 214 children. 183 of them are girls. How many boys are there?
  9. 9.259 − ? = 62
  10. 10.429 − 330 =
  11. 11.298 − 184 =
  12. 12.A school has 585 children. 380 of them are girls. How many boys are there?
  13. 13.A train has 131 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  14. 14.A train has 285 people in the front coaches and 252 people in the back coaches. How many people are on the train?
  15. 15.605 + ? = 917
  16. 16.831 − ? = 524
  17. 17.892 − 494 =
  18. 18.357 + 315 =
  19. 19.A school has 384 children. 104 of them are girls. How many boys are there?
  20. 20.A train has 109 people in the front coaches and 665 people in the back coaches. How many people are on the train?
  21. 21.598 − 208 =
  22. 22.A train has 200 people in the front coaches and 338 people in the back coaches. How many people are on the train?
  23. 23.956 − 854 =
  24. 24.809 + 179 =
  25. 25.462 + 195 =
  26. 26.354 + 622 =
  27. 27.A train has 541 people in the front coaches and 431 people in the back coaches. How many people are on the train?
  28. 28.? + 774 = 893
  29. 29.121 + ? = 597
  30. 30.698 + 211 =
  31. 31.460 + 419 =
  32. 32.641 + 134 =
  33. 33.A school has 351 children. 199 of them are girls. How many boys are there?
  34. 34.? − 540 = 97
  35. 35.237 + ? = 399
  36. 36.A train has 547 people in the front coaches and 378 people in the back coaches. How many people are on the train?
  37. 37.524 − 317 =
  38. 38.A train has 827 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  39. 39.163 + 377 =
  40. 40.A school has 633 children. 276 of them are girls. How many boys are there?

Answer key

  1. 990
  2. 316
  3. 145
  4. 894
  5. 164
  6. 633
  7. 393
  8. 31
  9. 197
  10. 99
  11. 114
  12. 205
  13. 250
  14. 537
  15. 312
  16. 307
  17. 398
  18. 672
  19. 280
  20. 774
  21. 390
  22. 538
  23. 102
  24. 988
  25. 657
  26. 976
  27. 972
  28. 119
  29. 476
  30. 909
  31. 879
  32. 775
  33. 152
  34. 637
  35. 162
  36. 925
  37. 207
  38. 929
  39. 540
  40. 357

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