← 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 146 · 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.? − 110 = 406
  2. 2.313 + 667 =
  3. 3.359 + ? = 608
  4. 4.647 + ? = 772
  5. 5.609 − 410 =
  6. 6.? − 223 = 108
  7. 7.A school has 591 children. 533 of them are girls. How many boys are there?
  8. 8.? − 519 = 110
  9. 9.563 + 350 =
  10. 10.A train has 400 people in the front coaches and 386 people in the back coaches. How many people are on the train?
  11. 11.227 − 111 =
  12. 12.658 + ? = 993
  13. 13.A train has 409 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  14. 14.? − 159 = 83
  15. 15.488 − ? = 326
  16. 16.A school has 585 children. 190 of them are girls. How many boys are there?
  17. 17.? + 707 = 975
  18. 18.800 + 119 =
  19. 19.750 + 147 =
  20. 20.487 − 425 =
  21. 21.? + 626 = 966
  22. 22.426 − 278 =
  23. 23.863 − ? = 382
  24. 24.463 + ? = 751
  25. 25.? + 429 = 551
  26. 26.290 + ? = 574
  27. 27.751 + 141 =
  28. 28.A school has 775 children. 765 of them are girls. How many boys are there?
  29. 29.A train has 318 people in the front coaches and 318 people in the back coaches. How many people are on the train?
  30. 30.388 + ? = 854
  31. 31.A train has 494 people in the front coaches and 245 people in the back coaches. How many people are on the train?
  32. 32.245 + 154 =
  33. 33.A train has 142 people in the front coaches and 685 people in the back coaches. How many people are on the train?
  34. 34.561 + 283 =
  35. 35.A school has 407 children. 366 of them are girls. How many boys are there?
  36. 36.A train has 809 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  37. 37.886 + 106 =
  38. 38.? + 604 = 768
  39. 39.? − 233 = 301
  40. 40.869 − ? = 288

Answer key

  1. 516
  2. 980
  3. 249
  4. 125
  5. 199
  6. 331
  7. 58
  8. 629
  9. 913
  10. 786
  11. 116
  12. 335
  13. 548
  14. 242
  15. 162
  16. 395
  17. 268
  18. 919
  19. 897
  20. 62
  21. 340
  22. 148
  23. 481
  24. 288
  25. 122
  26. 284
  27. 892
  28. 10
  29. 636
  30. 466
  31. 739
  32. 399
  33. 827
  34. 844
  35. 41
  36. 996
  37. 992
  38. 164
  39. 534
  40. 581

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