← 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 903 · 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 873 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  2. 2.A train has 674 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  3. 3.A train has 157 people in the front coaches and 185 people in the back coaches. How many people are on the train?
  4. 4.492 + ? = 929
  5. 5.636 + 141 =
  6. 6.409 − 309 =
  7. 7.A train has 228 people in the front coaches and 763 people in the back coaches. How many people are on the train?
  8. 8.697 + 106 =
  9. 9.A school has 486 children. 172 of them are girls. How many boys are there?
  10. 10.? − 311 = 485
  11. 11.471 − 329 =
  12. 12.A train has 526 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  13. 13.? − 761 = 129
  14. 14.A school has 924 children. 238 of them are girls. How many boys are there?
  15. 15.? − 111 = 135
  16. 16.A school has 724 children. 642 of them are girls. How many boys are there?
  17. 17.333 + 427 =
  18. 18.551 + 382 =
  19. 19.938 − 327 =
  20. 20.254 − 230 =
  21. 21.A school has 569 children. 545 of them are girls. How many boys are there?
  22. 22.A train has 759 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  23. 23.484 − 278 =
  24. 24.423 − ? = 21
  25. 25.769 − 674 =
  26. 26.420 − 371 =
  27. 27.? + 153 = 330
  28. 28.A school has 429 children. 249 of them are girls. How many boys are there?
  29. 29.447 + 366 =
  30. 30.859 − 270 =
  31. 31.700 + ? = 898
  32. 32.780 − ? = 334
  33. 33.236 − 166 =
  34. 34.698 + 159 =
  35. 35.713 − 277 =
  36. 36.798 − 234 =
  37. 37.336 + 274 =
  38. 38.899 − ? = 50
  39. 39.680 − 191 =
  40. 40.553 + 352 =

Answer key

  1. 990
  2. 788
  3. 342
  4. 437
  5. 777
  6. 100
  7. 991
  8. 803
  9. 314
  10. 796
  11. 142
  12. 674
  13. 890
  14. 686
  15. 246
  16. 82
  17. 760
  18. 933
  19. 611
  20. 24
  21. 24
  22. 869
  23. 206
  24. 402
  25. 95
  26. 49
  27. 177
  28. 180
  29. 813
  30. 589
  31. 198
  32. 446
  33. 70
  34. 857
  35. 436
  36. 564
  37. 610
  38. 849
  39. 489
  40. 905

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