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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 769 · 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. 1.755 − ? = 149
  2. 2.573 − 279 =
  3. 3.? − 274 = 59
  4. 4.? + 130 = 792
  5. 5.221 + ? = 478
  6. 6.627 + ? = 847
  7. 7.725 − 441 =
  8. 8.A school has 212 children. 204 of them are girls. How many boys are there?
  9. 9.A school has 411 children. 138 of them are girls. How many boys are there?
  10. 10.870 − ? = 150
  11. 11.A train has 393 people in the front coaches and 605 people in the back coaches. How many people are on the train?
  12. 12.895 − 236 =
  13. 13.525 − ? = 24
  14. 14.? − 405 = 251
  15. 15.A school has 947 children. 699 of them are girls. How many boys are there?
  16. 16.? + 846 = 982
  17. 17.? − 165 = 725
  18. 18.A train has 783 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  19. 19.A school has 620 children. 180 of them are girls. How many boys are there?
  20. 20.A train has 584 people in the front coaches and 236 people in the back coaches. How many people are on the train?
  21. 21.A train has 831 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  22. 22.A school has 974 children. 521 of them are girls. How many boys are there?
  23. 23.? + 289 = 974
  24. 24.? + 242 = 483
  25. 25.881 + 103 =
  26. 26.512 − ? = 326
  27. 27.A school has 955 children. 700 of them are girls. How many boys are there?
  28. 28.801 − 714 =
  29. 29.? − 366 = 41
  30. 30.A school has 465 children. 316 of them are girls. How many boys are there?
  31. 31.744 + 195 =
  32. 32.A train has 206 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  33. 33.353 − 143 =
  34. 34.A school has 919 children. 212 of them are girls. How many boys are there?
  35. 35.A train has 845 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  36. 36.620 − 315 =
  37. 37.531 + 425 =
  38. 38.? − 215 = 129
  39. 39.863 + ? = 977
  40. 40.639 + 197 =

Answer key

  1. 606
  2. 294
  3. 333
  4. 662
  5. 257
  6. 220
  7. 284
  8. 8
  9. 273
  10. 720
  11. 998
  12. 659
  13. 501
  14. 656
  15. 248
  16. 136
  17. 890
  18. 942
  19. 440
  20. 820
  21. 982
  22. 453
  23. 685
  24. 241
  25. 984
  26. 186
  27. 255
  28. 87
  29. 407
  30. 149
  31. 939
  32. 483
  33. 210
  34. 707
  35. 999
  36. 305
  37. 956
  38. 344
  39. 114
  40. 836

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