← 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 908 · 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. 1.661 + ? = 866
  2. 2.738 − 217 =
  3. 3.A train has 124 people in the front coaches and 334 people in the back coaches. How many people are on the train?
  4. 4.753 + 225 =
  5. 5.516 + ? = 857
  6. 6.A train has 448 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  7. 7.A school has 715 children. 157 of them are girls. How many boys are there?
  8. 8.? − 173 = 114
  9. 9.413 + 380 =
  10. 10.405 − 259 =
  11. 11.651 − 516 =
  12. 12.247 − 109 =
  13. 13.954 − 807 =
  14. 14.327 + ? = 514
  15. 15.A train has 102 people in the front coaches and 461 people in the back coaches. How many people are on the train?
  16. 16.A train has 592 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  17. 17.417 + 304 =
  18. 18.A train has 292 people in the front coaches and 603 people in the back coaches. How many people are on the train?
  19. 19.343 − ? = 125
  20. 20.714 + 158 =
  21. 21.? − 446 = 125
  22. 22.667 − 438 =
  23. 23.? − 199 = 500
  24. 24.? − 381 = 337
  25. 25.226 + 454 =
  26. 26.? + 811 = 922
  27. 27.A school has 367 children. 145 of them are girls. How many boys are there?
  28. 28.A school has 948 children. 705 of them are girls. How many boys are there?
  29. 29.106 + 430 =
  30. 30.205 + 338 =
  31. 31.? + 810 = 949
  32. 32.151 + 160 =
  33. 33.A school has 942 children. 510 of them are girls. How many boys are there?
  34. 34.294 − 280 =
  35. 35.? + 676 = 841
  36. 36.209 − 116 =
  37. 37.A train has 856 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  38. 38.? − 145 = 290
  39. 39.A train has 818 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  40. 40.649 + 174 =

Answer key

  1. 205
  2. 521
  3. 458
  4. 978
  5. 341
  6. 639
  7. 558
  8. 287
  9. 793
  10. 146
  11. 135
  12. 138
  13. 147
  14. 187
  15. 563
  16. 832
  17. 721
  18. 895
  19. 218
  20. 872
  21. 571
  22. 229
  23. 699
  24. 718
  25. 680
  26. 111
  27. 222
  28. 243
  29. 536
  30. 543
  31. 139
  32. 311
  33. 432
  34. 14
  35. 165
  36. 93
  37. 967
  38. 435
  39. 978
  40. 823

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