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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 370 · 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. 1.543 − 425 =
  2. 2.665 − 270 =
  3. 3.890 + 109 =
  4. 4.A school has 739 children. 496 of them are girls. How many boys are there?
  5. 5.587 − 202 =
  6. 6.359 − ? = 156
  7. 7.776 − 662 =
  8. 8.? + 534 = 661
  9. 9.A train has 424 people in the front coaches and 185 people in the back coaches. How many people are on the train?
  10. 10.A school has 801 children. 194 of them are girls. How many boys are there?
  11. 11.? + 326 = 946
  12. 12.327 − 151 =
  13. 13.349 − 200 =
  14. 14.585 + 352 =
  15. 15.? + 501 = 815
  16. 16.572 + ? = 697
  17. 17.A school has 900 children. 130 of them are girls. How many boys are there?
  18. 18.A school has 235 children. 143 of them are girls. How many boys are there?
  19. 19.A school has 469 children. 200 of them are girls. How many boys are there?
  20. 20.A school has 719 children. 535 of them are girls. How many boys are there?
  21. 21.? − 249 = 291
  22. 22.668 − 203 =
  23. 23.849 + ? = 965
  24. 24.A train has 851 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  25. 25.A train has 536 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  26. 26.763 + ? = 949
  27. 27.A school has 290 children. 151 of them are girls. How many boys are there?
  28. 28.893 − 704 =
  29. 29.337 − ? = 66
  30. 30.225 + 474 =
  31. 31.680 − 201 =
  32. 32.A train has 897 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  33. 33.? + 719 = 839
  34. 34.A train has 825 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  35. 35.213 + ? = 941
  36. 36.237 − 227 =
  37. 37.A train has 847 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  38. 38.A train has 751 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  39. 39.366 − ? = 266
  40. 40.A train has 742 people in the front coaches and 171 people in the back coaches. How many people are on the train?

Answer key

  1. 118
  2. 395
  3. 999
  4. 243
  5. 385
  6. 203
  7. 114
  8. 127
  9. 609
  10. 607
  11. 620
  12. 176
  13. 149
  14. 937
  15. 314
  16. 125
  17. 770
  18. 92
  19. 269
  20. 184
  21. 540
  22. 465
  23. 116
  24. 952
  25. 647
  26. 186
  27. 139
  28. 189
  29. 271
  30. 699
  31. 479
  32. 998
  33. 120
  34. 982
  35. 728
  36. 10
  37. 993
  38. 855
  39. 100
  40. 913

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