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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 450 · 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. 1.364 − 168 =
  2. 2.A school has 272 children. 209 of them are girls. How many boys are there?
  3. 3.507 − 363 =
  4. 4.A school has 646 children. 503 of them are girls. How many boys are there?
  5. 5.280 − 100 =
  6. 6.787 + 181 =
  7. 7.? − 169 = 333
  8. 8.788 − 520 =
  9. 9.898 − ? = 757
  10. 10.499 − 248 =
  11. 11.799 + 118 =
  12. 12.? − 124 = 249
  13. 13.252 − 125 =
  14. 14.475 − 187 =
  15. 15.333 − 222 =
  16. 16.790 − ? = 340
  17. 17.372 − 192 =
  18. 18.296 + ? = 577
  19. 19.A school has 232 children. 144 of them are girls. How many boys are there?
  20. 20.A school has 251 children. 213 of them are girls. How many boys are there?
  21. 21.534 + 378 =
  22. 22.A train has 809 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  23. 23.228 − 223 =
  24. 24.108 + ? = 989
  25. 25.A school has 226 children. 100 of them are girls. How many boys are there?
  26. 26.428 − 369 =
  27. 27.A train has 626 people in the front coaches and 229 people in the back coaches. How many people are on the train?
  28. 28.A train has 841 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  29. 29.A school has 283 children. 276 of them are girls. How many boys are there?
  30. 30.A train has 744 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  31. 31.? + 759 = 888
  32. 32.A train has 764 people in the front coaches and 200 people in the back coaches. How many people are on the train?
  33. 33.441 + 432 =
  34. 34.658 + 263 =
  35. 35.508 − ? = 359
  36. 36.561 − 201 =
  37. 37.601 − 567 =
  38. 38.387 + ? = 692
  39. 39.? + 818 = 950
  40. 40.A school has 434 children. 186 of them are girls. How many boys are there?

Answer key

  1. 196
  2. 63
  3. 144
  4. 143
  5. 180
  6. 968
  7. 502
  8. 268
  9. 141
  10. 251
  11. 917
  12. 373
  13. 127
  14. 288
  15. 111
  16. 450
  17. 180
  18. 281
  19. 88
  20. 38
  21. 912
  22. 920
  23. 5
  24. 881
  25. 126
  26. 59
  27. 855
  28. 961
  29. 7
  30. 883
  31. 129
  32. 964
  33. 873
  34. 921
  35. 149
  36. 360
  37. 34
  38. 305
  39. 132
  40. 248

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