← 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 578 · 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 school has 766 children. 577 of them are girls. How many boys are there?
  2. 2.A train has 234 people in the front coaches and 532 people in the back coaches. How many people are on the train?
  3. 3.140 + 582 =
  4. 4.761 − 190 =
  5. 5.711 − 523 =
  6. 6.534 − 333 =
  7. 7.185 + 280 =
  8. 8.? + 255 = 874
  9. 9.634 + 323 =
  10. 10.A school has 487 children. 411 of them are girls. How many boys are there?
  11. 11.147 + 765 =
  12. 12.662 + 247 =
  13. 13.105 + ? = 548
  14. 14.A school has 882 children. 712 of them are girls. How many boys are there?
  15. 15.? + 141 = 631
  16. 16.A train has 807 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  17. 17.A train has 604 people in the front coaches and 301 people in the back coaches. How many people are on the train?
  18. 18.A train has 177 people in the front coaches and 289 people in the back coaches. How many people are on the train?
  19. 19.? − 269 = 296
  20. 20.988 − ? = 458
  21. 21.615 + 188 =
  22. 22.? + 115 = 355
  23. 23.A train has 592 people in the front coaches and 122 people in the back coaches. How many people are on the train?
  24. 24.252 + ? = 923
  25. 25.739 + 212 =
  26. 26.? + 277 = 811
  27. 27.A train has 451 people in the front coaches and 498 people in the back coaches. How many people are on the train?
  28. 28.530 + 153 =
  29. 29.347 + 524 =
  30. 30.? + 239 = 724
  31. 31.A school has 715 children. 713 of them are girls. How many boys are there?
  32. 32.? − 251 = 582
  33. 33.A school has 899 children. 843 of them are girls. How many boys are there?
  34. 34.207 − 108 =
  35. 35.507 + 389 =
  36. 36.397 + 543 =
  37. 37.811 + 144 =
  38. 38.254 + 133 =
  39. 39.735 − 545 =
  40. 40.? − 176 = 145

Answer key

  1. 189
  2. 766
  3. 722
  4. 571
  5. 188
  6. 201
  7. 465
  8. 619
  9. 957
  10. 76
  11. 912
  12. 909
  13. 443
  14. 170
  15. 490
  16. 940
  17. 905
  18. 466
  19. 565
  20. 530
  21. 803
  22. 240
  23. 714
  24. 671
  25. 951
  26. 534
  27. 949
  28. 683
  29. 871
  30. 485
  31. 2
  32. 833
  33. 56
  34. 99
  35. 896
  36. 940
  37. 955
  38. 387
  39. 190
  40. 321

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