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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 488 · 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 306 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  2. 2.905 − 787 =
  3. 3.111 + ? = 795
  4. 4.896 + ? = 997
  5. 5.196 + 661 =
  6. 6.303 + 536 =
  7. 7.671 − ? = 164
  8. 8.428 + 239 =
  9. 9.214 + ? = 581
  10. 10.? + 464 = 983
  11. 11.319 − 147 =
  12. 12.A school has 306 children. 223 of them are girls. How many boys are there?
  13. 13.529 + 270 =
  14. 14.? − 127 = 391
  15. 15.? − 209 = 82
  16. 16.759 + 239 =
  17. 17.A school has 268 children. 133 of them are girls. How many boys are there?
  18. 18.A school has 351 children. 178 of them are girls. How many boys are there?
  19. 19.166 + ? = 622
  20. 20.A train has 290 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  21. 21.A school has 238 children. 229 of them are girls. How many boys are there?
  22. 22.? − 250 = 34
  23. 23.678 + 199 =
  24. 24.664 − 454 =
  25. 25.606 − 472 =
  26. 26.A school has 437 children. 284 of them are girls. How many boys are there?
  27. 27.292 − 266 =
  28. 28.A school has 888 children. 641 of them are girls. How many boys are there?
  29. 29.A school has 685 children. 600 of them are girls. How many boys are there?
  30. 30.319 + ? = 907
  31. 31.117 + ? = 931
  32. 32.107 + 605 =
  33. 33.474 + 295 =
  34. 34.425 + 335 =
  35. 35.568 − ? = 206
  36. 36.722 − 462 =
  37. 37.A school has 718 children. 374 of them are girls. How many boys are there?
  38. 38.777 − 765 =
  39. 39.481 − 181 =
  40. 40.A train has 111 people in the front coaches and 291 people in the back coaches. How many people are on the train?

Answer key

  1. 474
  2. 118
  3. 684
  4. 101
  5. 857
  6. 839
  7. 507
  8. 667
  9. 367
  10. 519
  11. 172
  12. 83
  13. 799
  14. 518
  15. 291
  16. 998
  17. 135
  18. 173
  19. 456
  20. 530
  21. 9
  22. 284
  23. 877
  24. 210
  25. 134
  26. 153
  27. 26
  28. 247
  29. 85
  30. 588
  31. 814
  32. 712
  33. 769
  34. 760
  35. 362
  36. 260
  37. 344
  38. 12
  39. 300
  40. 402

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