← 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 596 · 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 141 people in the front coaches and 699 people in the back coaches. How many people are on the train?
  2. 2.884 + ? = 992
  3. 3.240 − 134 =
  4. 4.380 + 326 =
  5. 5.127 + 390 =
  6. 6.331 − 239 =
  7. 7.466 − 168 =
  8. 8.A train has 559 people in the front coaches and 364 people in the back coaches. How many people are on the train?
  9. 9.720 + 140 =
  10. 10.A train has 308 people in the front coaches and 666 people in the back coaches. How many people are on the train?
  11. 11.A school has 337 children. 226 of them are girls. How many boys are there?
  12. 12.956 − 454 =
  13. 13.442 − 113 =
  14. 14.631 + 101 =
  15. 15.746 − ? = 553
  16. 16.869 + 106 =
  17. 17.819 + 100 =
  18. 18.438 − ? = 44
  19. 19.701 − 487 =
  20. 20.A school has 995 children. 707 of them are girls. How many boys are there?
  21. 21.281 + ? = 970
  22. 22.? + 628 = 786
  23. 23.A school has 950 children. 872 of them are girls. How many boys are there?
  24. 24.A school has 731 children. 612 of them are girls. How many boys are there?
  25. 25.A school has 653 children. 422 of them are girls. How many boys are there?
  26. 26.A train has 363 people in the front coaches and 431 people in the back coaches. How many people are on the train?
  27. 27.A train has 357 people in the front coaches and 610 people in the back coaches. How many people are on the train?
  28. 28.247 + 691 =
  29. 29.821 + 163 =
  30. 30.655 − 132 =
  31. 31.629 + 278 =
  32. 32.A school has 379 children. 326 of them are girls. How many boys are there?
  33. 33.620 − 148 =
  34. 34.589 − 573 =
  35. 35.? + 424 = 546
  36. 36.A train has 204 people in the front coaches and 385 people in the back coaches. How many people are on the train?
  37. 37.359 − ? = 154
  38. 38.375 − ? = 249
  39. 39.563 − 388 =
  40. 40.A school has 946 children. 865 of them are girls. How many boys are there?

Answer key

  1. 840
  2. 108
  3. 106
  4. 706
  5. 517
  6. 92
  7. 298
  8. 923
  9. 860
  10. 974
  11. 111
  12. 502
  13. 329
  14. 732
  15. 193
  16. 975
  17. 919
  18. 394
  19. 214
  20. 288
  21. 689
  22. 158
  23. 78
  24. 119
  25. 231
  26. 794
  27. 967
  28. 938
  29. 984
  30. 523
  31. 907
  32. 53
  33. 472
  34. 16
  35. 122
  36. 589
  37. 205
  38. 126
  39. 175
  40. 81

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