← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 850 · 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. 1.844 + 100 =
  2. 2.158 + 431 =
  3. 3.A train has 328 people in the front coaches and 513 people in the back coaches. How many people are on the train?
  4. 4.665 + 251 =
  5. 5.A train has 704 people in the front coaches and 200 people in the back coaches. How many people are on the train?
  6. 6.? + 319 = 732
  7. 7.377 + ? = 926
  8. 8.624 + 155 =
  9. 9.207 + 183 =
  10. 10.732 + 215 =
  11. 11.491 − 450 =
  12. 12.281 − 277 =
  13. 13.583 − 394 =
  14. 14.174 + 626 =
  15. 15.A train has 563 people in the front coaches and 399 people in the back coaches. How many people are on the train?
  16. 16.A train has 226 people in the front coaches and 650 people in the back coaches. How many people are on the train?
  17. 17.A train has 128 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  18. 18.109 + 767 =
  19. 19.814 − 563 =
  20. 20.A school has 765 children. 400 of them are girls. How many boys are there?
  21. 21.A train has 566 people in the front coaches and 264 people in the back coaches. How many people are on the train?
  22. 22.523 + ? = 687
  23. 23.331 − 122 =
  24. 24.278 + 159 =
  25. 25.A school has 611 children. 189 of them are girls. How many boys are there?
  26. 26.A train has 792 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  27. 27.? − 329 = 589
  28. 28.529 + 359 =
  29. 29.A train has 131 people in the front coaches and 795 people in the back coaches. How many people are on the train?
  30. 30.? + 683 = 993
  31. 31.497 + 134 =
  32. 32.130 + 289 =
  33. 33.669 − 366 =
  34. 34.A school has 461 children. 279 of them are girls. How many boys are there?
  35. 35.A school has 444 children. 304 of them are girls. How many boys are there?
  36. 36.966 − 927 =
  37. 37.369 − ? = 13
  38. 38.A train has 149 people in the front coaches and 643 people in the back coaches. How many people are on the train?
  39. 39.694 − ? = 434
  40. 40.445 + 399 =

Answer key

  1. 944
  2. 589
  3. 841
  4. 916
  5. 904
  6. 413
  7. 549
  8. 779
  9. 390
  10. 947
  11. 41
  12. 4
  13. 189
  14. 800
  15. 962
  16. 876
  17. 241
  18. 876
  19. 251
  20. 365
  21. 830
  22. 164
  23. 209
  24. 437
  25. 422
  26. 971
  27. 918
  28. 888
  29. 926
  30. 310
  31. 631
  32. 419
  33. 303
  34. 182
  35. 140
  36. 39
  37. 356
  38. 792
  39. 260
  40. 844

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets