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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 213 · 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. 1.147 + 578 =
  2. 2.699 + 111 =
  3. 3.A school has 304 children. 154 of them are girls. How many boys are there?
  4. 4.389 − 237 =
  5. 5.A school has 261 children. 223 of them are girls. How many boys are there?
  6. 6.327 + 580 =
  7. 7.A school has 639 children. 466 of them are girls. How many boys are there?
  8. 8.937 − ? = 716
  9. 9.A school has 211 children. 134 of them are girls. How many boys are there?
  10. 10.656 + ? = 972
  11. 11.817 + 105 =
  12. 12.289 + 609 =
  13. 13.531 + 303 =
  14. 14.A school has 675 children. 265 of them are girls. How many boys are there?
  15. 15.? + 112 = 404
  16. 16.216 + ? = 700
  17. 17.391 − 165 =
  18. 18.A train has 297 people in the front coaches and 467 people in the back coaches. How many people are on the train?
  19. 19.593 + 292 =
  20. 20.? − 344 = 360
  21. 21.A school has 270 children. 205 of them are girls. How many boys are there?
  22. 22.? + 277 = 966
  23. 23.A school has 545 children. 434 of them are girls. How many boys are there?
  24. 24.? − 809 = 146
  25. 25.A train has 376 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  26. 26.? − 286 = 56
  27. 27.A school has 991 children. 446 of them are girls. How many boys are there?
  28. 28.587 − 384 =
  29. 29.A train has 100 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  30. 30.456 − ? = 114
  31. 31.426 − ? = 257
  32. 32.159 + 491 =
  33. 33.394 − ? = 235
  34. 34.A train has 407 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  35. 35.284 − 160 =
  36. 36.A train has 440 people in the front coaches and 253 people in the back coaches. How many people are on the train?
  37. 37.586 + 375 =
  38. 38.A train has 695 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  39. 39.A train has 559 people in the front coaches and 291 people in the back coaches. How many people are on the train?
  40. 40.A train has 660 people in the front coaches and 194 people in the back coaches. How many people are on the train?

Answer key

  1. 725
  2. 810
  3. 150
  4. 152
  5. 38
  6. 907
  7. 173
  8. 221
  9. 77
  10. 316
  11. 922
  12. 898
  13. 834
  14. 410
  15. 292
  16. 484
  17. 226
  18. 764
  19. 885
  20. 704
  21. 65
  22. 689
  23. 111
  24. 955
  25. 769
  26. 342
  27. 545
  28. 203
  29. 318
  30. 342
  31. 169
  32. 650
  33. 159
  34. 544
  35. 124
  36. 693
  37. 961
  38. 900
  39. 850
  40. 854

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