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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 935 · 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 school has 679 children. 526 of them are girls. How many boys are there?
  2. 2.A train has 193 people in the front coaches and 619 people in the back coaches. How many people are on the train?
  3. 3.408 + ? = 585
  4. 4.818 + 139 =
  5. 5.842 − 307 =
  6. 6.441 − ? = 211
  7. 7.977 − 260 =
  8. 8.449 + 303 =
  9. 9.942 − ? = 217
  10. 10.317 + 263 =
  11. 11.A train has 134 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  12. 12.A train has 700 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  13. 13.A train has 298 people in the front coaches and 635 people in the back coaches. How many people are on the train?
  14. 14.A school has 903 children. 531 of them are girls. How many boys are there?
  15. 15.899 − 338 =
  16. 16.? + 356 = 532
  17. 17.939 − 258 =
  18. 18.210 − ? = 33
  19. 19.257 + 489 =
  20. 20.325 − 132 =
  21. 21.713 + ? = 872
  22. 22.? + 545 = 967
  23. 23.811 − 579 =
  24. 24.638 + ? = 801
  25. 25.261 + 405 =
  26. 26.278 + ? = 728
  27. 27.A school has 417 children. 149 of them are girls. How many boys are there?
  28. 28.579 − 410 =
  29. 29.A school has 247 children. 232 of them are girls. How many boys are there?
  30. 30.? − 204 = 208
  31. 31.647 + 183 =
  32. 32.A train has 467 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  33. 33.A school has 212 children. 137 of them are girls. How many boys are there?
  34. 34.598 − 157 =
  35. 35.195 + ? = 787
  36. 36.401 + 568 =
  37. 37.684 + ? = 939
  38. 38.? − 292 = 55
  39. 39.712 − ? = 283
  40. 40.981 − 895 =

Answer key

  1. 153
  2. 812
  3. 177
  4. 957
  5. 535
  6. 230
  7. 717
  8. 752
  9. 725
  10. 580
  11. 285
  12. 913
  13. 933
  14. 372
  15. 561
  16. 176
  17. 681
  18. 177
  19. 746
  20. 193
  21. 159
  22. 422
  23. 232
  24. 163
  25. 666
  26. 450
  27. 268
  28. 169
  29. 15
  30. 412
  31. 830
  32. 654
  33. 75
  34. 441
  35. 592
  36. 969
  37. 255
  38. 347
  39. 429
  40. 86

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