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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 702 · 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 153 people in the front coaches and 816 people in the back coaches. How many people are on the train?
  2. 2.A school has 592 children. 262 of them are girls. How many boys are there?
  3. 3.721 − 432 =
  4. 4.645 + ? = 847
  5. 5.912 − ? = 231
  6. 6.A train has 764 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  7. 7.A train has 850 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  8. 8.? − 242 = 6
  9. 9.A train has 128 people in the front coaches and 791 people in the back coaches. How many people are on the train?
  10. 10.? − 875 = 119
  11. 11.? + 472 = 901
  12. 12.275 + 531 =
  13. 13.897 − ? = 194
  14. 14.607 − ? = 465
  15. 15.517 − 505 =
  16. 16.629 + 143 =
  17. 17.A school has 739 children. 581 of them are girls. How many boys are there?
  18. 18.571 − ? = 165
  19. 19.269 − ? = 130
  20. 20.592 − 430 =
  21. 21.A train has 488 people in the front coaches and 342 people in the back coaches. How many people are on the train?
  22. 22.A train has 268 people in the front coaches and 475 people in the back coaches. How many people are on the train?
  23. 23.A train has 620 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  24. 24.816 − 672 =
  25. 25.A school has 850 children. 486 of them are girls. How many boys are there?
  26. 26.413 − 403 =
  27. 27.A train has 134 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  28. 28.A train has 127 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  29. 29.542 + ? = 906
  30. 30.578 + ? = 697
  31. 31.A train has 761 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  32. 32.? − 480 = 40
  33. 33.819 − 176 =
  34. 34.669 − ? = 440
  35. 35.516 − ? = 119
  36. 36.394 − ? = 198
  37. 37.274 + ? = 907
  38. 38.362 + 553 =
  39. 39.288 + 681 =
  40. 40.A train has 530 people in the front coaches and 104 people in the back coaches. How many people are on the train?

Answer key

  1. 969
  2. 330
  3. 289
  4. 202
  5. 681
  6. 918
  7. 970
  8. 248
  9. 919
  10. 994
  11. 429
  12. 806
  13. 703
  14. 142
  15. 12
  16. 772
  17. 158
  18. 406
  19. 139
  20. 162
  21. 830
  22. 743
  23. 829
  24. 144
  25. 364
  26. 10
  27. 343
  28. 254
  29. 364
  30. 119
  31. 913
  32. 520
  33. 643
  34. 229
  35. 397
  36. 196
  37. 633
  38. 915
  39. 969
  40. 634

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