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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 221 · 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. 1.666 − 553 =
  2. 2.A school has 664 children. 273 of them are girls. How many boys are there?
  3. 3.114 + 189 =
  4. 4.443 − ? = 247
  5. 5.722 − 611 =
  6. 6.748 − 425 =
  7. 7.827 − 458 =
  8. 8.871 + 110 =
  9. 9.799 − ? = 498
  10. 10.792 + 101 =
  11. 11.A train has 115 people in the front coaches and 441 people in the back coaches. How many people are on the train?
  12. 12.378 + 506 =
  13. 13.457 + 229 =
  14. 14.365 − ? = 49
  15. 15.A school has 759 children. 215 of them are girls. How many boys are there?
  16. 16.860 − ? = 15
  17. 17.731 − ? = 266
  18. 18.532 − ? = 365
  19. 19.816 − 736 =
  20. 20.627 + 270 =
  21. 21.686 + 275 =
  22. 22.648 − 562 =
  23. 23.289 + 670 =
  24. 24.A train has 812 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  25. 25.319 + 553 =
  26. 26.806 − ? = 499
  27. 27.A train has 448 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  28. 28.A school has 817 children. 230 of them are girls. How many boys are there?
  29. 29.329 − ? = 83
  30. 30.328 + 227 =
  31. 31.A train has 870 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  32. 32.? + 750 = 899
  33. 33.A train has 738 people in the front coaches and 253 people in the back coaches. How many people are on the train?
  34. 34.A train has 633 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  35. 35.194 + 287 =
  36. 36.354 + 496 =
  37. 37.146 + ? = 922
  38. 38.443 − ? = 343
  39. 39.A school has 359 children. 174 of them are girls. How many boys are there?
  40. 40.401 + 524 =

Answer key

  1. 113
  2. 391
  3. 303
  4. 196
  5. 111
  6. 323
  7. 369
  8. 981
  9. 301
  10. 893
  11. 556
  12. 884
  13. 686
  14. 316
  15. 544
  16. 845
  17. 465
  18. 167
  19. 80
  20. 897
  21. 961
  22. 86
  23. 959
  24. 980
  25. 872
  26. 307
  27. 610
  28. 587
  29. 246
  30. 555
  31. 982
  32. 149
  33. 991
  34. 774
  35. 481
  36. 850
  37. 776
  38. 100
  39. 185
  40. 925

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