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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 894 · 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. 1.699 − ? = 565
  2. 2.? + 812 = 983
  3. 3.A train has 158 people in the front coaches and 549 people in the back coaches. How many people are on the train?
  4. 4.A train has 586 people in the front coaches and 221 people in the back coaches. How many people are on the train?
  5. 5.201 + 310 =
  6. 6.726 − ? = 512
  7. 7.A train has 221 people in the front coaches and 199 people in the back coaches. How many people are on the train?
  8. 8.716 − ? = 1
  9. 9.475 + 385 =
  10. 10.752 − 513 =
  11. 11.457 + 250 =
  12. 12.763 + 128 =
  13. 13.897 + 100 =
  14. 14.A school has 944 children. 428 of them are girls. How many boys are there?
  15. 15.A school has 433 children. 216 of them are girls. How many boys are there?
  16. 16.A train has 110 people in the front coaches and 580 people in the back coaches. How many people are on the train?
  17. 17.A train has 649 people in the front coaches and 292 people in the back coaches. How many people are on the train?
  18. 18.? + 721 = 934
  19. 19.317 + 629 =
  20. 20.808 + 190 =
  21. 21.A train has 218 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  22. 22.273 − ? = 25
  23. 23.509 + ? = 799
  24. 24.412 − ? = 47
  25. 25.A school has 891 children. 155 of them are girls. How many boys are there?
  26. 26.A train has 152 people in the front coaches and 265 people in the back coaches. How many people are on the train?
  27. 27.160 + 352 =
  28. 28.498 − 373 =
  29. 29.A school has 591 children. 400 of them are girls. How many boys are there?
  30. 30.125 + 290 =
  31. 31.765 + ? = 907
  32. 32.878 − ? = 343
  33. 33.137 + 198 =
  34. 34.774 + ? = 909
  35. 35.A school has 659 children. 567 of them are girls. How many boys are there?
  36. 36.304 − 232 =
  37. 37.414 − 248 =
  38. 38.256 + ? = 379
  39. 39.213 + ? = 805
  40. 40.A school has 361 children. 162 of them are girls. How many boys are there?

Answer key

  1. 134
  2. 171
  3. 707
  4. 807
  5. 511
  6. 214
  7. 420
  8. 715
  9. 860
  10. 239
  11. 707
  12. 891
  13. 997
  14. 516
  15. 217
  16. 690
  17. 941
  18. 213
  19. 946
  20. 998
  21. 319
  22. 248
  23. 290
  24. 365
  25. 736
  26. 417
  27. 512
  28. 125
  29. 191
  30. 415
  31. 142
  32. 535
  33. 335
  34. 135
  35. 92
  36. 72
  37. 166
  38. 123
  39. 592
  40. 199

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