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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 575 · 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 710 people in the front coaches and 289 people in the back coaches. How many people are on the train?
  2. 2.672 − 274 =
  3. 3.554 − 414 =
  4. 4.624 + 271 =
  5. 5.193 + 568 =
  6. 6.? + 199 = 659
  7. 7.A school has 778 children. 447 of them are girls. How many boys are there?
  8. 8.A school has 957 children. 207 of them are girls. How many boys are there?
  9. 9.? − 210 = 569
  10. 10.? − 398 = 191
  11. 11.? + 403 = 904
  12. 12.604 − 148 =
  13. 13.159 + 724 =
  14. 14.896 + 100 =
  15. 15.515 − ? = 342
  16. 16.895 − 752 =
  17. 17.A train has 520 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  18. 18.A train has 508 people in the front coaches and 467 people in the back coaches. How many people are on the train?
  19. 19.484 − ? = 135
  20. 20.A school has 429 children. 308 of them are girls. How many boys are there?
  21. 21.? + 347 = 931
  22. 22.? − 388 = 341
  23. 23.287 + ? = 417
  24. 24.? + 889 = 995
  25. 25.A school has 338 children. 167 of them are girls. How many boys are there?
  26. 26.A school has 888 children. 764 of them are girls. How many boys are there?
  27. 27.A train has 476 people in the front coaches and 331 people in the back coaches. How many people are on the train?
  28. 28.A train has 586 people in the front coaches and 165 people in the back coaches. How many people are on the train?
  29. 29.A train has 587 people in the front coaches and 354 people in the back coaches. How many people are on the train?
  30. 30.548 + ? = 945
  31. 31.A school has 595 children. 305 of them are girls. How many boys are there?
  32. 32.? − 153 = 277
  33. 33.379 + 114 =
  34. 34.A school has 709 children. 532 of them are girls. How many boys are there?
  35. 35.A school has 997 children. 372 of them are girls. How many boys are there?
  36. 36.619 + ? = 767
  37. 37.139 + 740 =
  38. 38.518 − ? = 390
  39. 39.A train has 151 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  40. 40.119 + 125 =

Answer key

  1. 999
  2. 398
  3. 140
  4. 895
  5. 761
  6. 460
  7. 331
  8. 750
  9. 779
  10. 589
  11. 501
  12. 456
  13. 883
  14. 996
  15. 173
  16. 143
  17. 674
  18. 975
  19. 349
  20. 121
  21. 584
  22. 729
  23. 130
  24. 106
  25. 171
  26. 124
  27. 807
  28. 751
  29. 941
  30. 397
  31. 290
  32. 430
  33. 493
  34. 177
  35. 625
  36. 148
  37. 879
  38. 128
  39. 337
  40. 244

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