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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 198 · 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. 1.249 − 120 =
  2. 2.A school has 418 children. 327 of them are girls. How many boys are there?
  3. 3.458 − 125 =
  4. 4.? − 370 = 428
  5. 5.791 + 132 =
  6. 6.? − 529 = 91
  7. 7.626 − ? = 159
  8. 8.A school has 328 children. 118 of them are girls. How many boys are there?
  9. 9.407 − ? = 111
  10. 10.373 − ? = 126
  11. 11.A school has 714 children. 568 of them are girls. How many boys are there?
  12. 12.572 + 302 =
  13. 13.420 − 164 =
  14. 14.A train has 146 people in the front coaches and 676 people in the back coaches. How many people are on the train?
  15. 15.466 − 152 =
  16. 16.369 − 335 =
  17. 17.A train has 454 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  18. 18.301 + 570 =
  19. 19.384 − 278 =
  20. 20.A school has 924 children. 368 of them are girls. How many boys are there?
  21. 21.675 + 258 =
  22. 22.985 − ? = 392
  23. 23.A train has 484 people in the front coaches and 362 people in the back coaches. How many people are on the train?
  24. 24.? − 135 = 127
  25. 25.A train has 270 people in the front coaches and 313 people in the back coaches. How many people are on the train?
  26. 26.700 − 167 =
  27. 27.A train has 219 people in the front coaches and 467 people in the back coaches. How many people are on the train?
  28. 28.A train has 787 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  29. 29.A train has 622 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  30. 30.A train has 800 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  31. 31.530 − 360 =
  32. 32.403 − 257 =
  33. 33.A school has 392 children. 217 of them are girls. How many boys are there?
  34. 34.109 + 712 =
  35. 35.A school has 876 children. 287 of them are girls. How many boys are there?
  36. 36.215 − 139 =
  37. 37.A school has 785 children. 682 of them are girls. How many boys are there?
  38. 38.A school has 862 children. 837 of them are girls. How many boys are there?
  39. 39.571 + ? = 759
  40. 40.A school has 827 children. 363 of them are girls. How many boys are there?

Answer key

  1. 129
  2. 91
  3. 333
  4. 798
  5. 923
  6. 620
  7. 467
  8. 210
  9. 296
  10. 247
  11. 146
  12. 874
  13. 256
  14. 822
  15. 314
  16. 34
  17. 667
  18. 871
  19. 106
  20. 556
  21. 933
  22. 593
  23. 846
  24. 262
  25. 583
  26. 533
  27. 686
  28. 981
  29. 761
  30. 910
  31. 170
  32. 146
  33. 175
  34. 821
  35. 589
  36. 76
  37. 103
  38. 25
  39. 188
  40. 464

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