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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 583 · 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 295 people in the front coaches and 292 people in the back coaches. How many people are on the train?
  2. 2.A school has 306 children. 108 of them are girls. How many boys are there?
  3. 3.716 + 231 =
  4. 4.A train has 497 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  5. 5.A school has 428 children. 109 of them are girls. How many boys are there?
  6. 6.136 + 853 =
  7. 7.A school has 588 children. 449 of them are girls. How many boys are there?
  8. 8.501 − ? = 169
  9. 9.627 + 338 =
  10. 10.A train has 237 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  11. 11.431 − ? = 192
  12. 12.971 − 223 =
  13. 13.A train has 838 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  14. 14.A train has 390 people in the front coaches and 467 people in the back coaches. How many people are on the train?
  15. 15.416 + 206 =
  16. 16.593 + ? = 746
  17. 17.123 + 151 =
  18. 18.? + 162 = 453
  19. 19.A train has 528 people in the front coaches and 286 people in the back coaches. How many people are on the train?
  20. 20.A school has 307 children. 246 of them are girls. How many boys are there?
  21. 21.A school has 565 children. 392 of them are girls. How many boys are there?
  22. 22.A school has 986 children. 866 of them are girls. How many boys are there?
  23. 23.202 + 717 =
  24. 24.595 + 103 =
  25. 25.A train has 755 people in the front coaches and 143 people in the back coaches. How many people are on the train?
  26. 26.A school has 232 children. 203 of them are girls. How many boys are there?
  27. 27.? − 203 = 233
  28. 28.662 + ? = 917
  29. 29.? + 119 = 297
  30. 30.267 − 192 =
  31. 31.A school has 971 children. 938 of them are girls. How many boys are there?
  32. 32.? − 140 = 151
  33. 33.281 + 143 =
  34. 34.266 + 494 =
  35. 35.110 + ? = 810
  36. 36.A school has 373 children. 107 of them are girls. How many boys are there?
  37. 37.? + 315 = 807
  38. 38.565 − 550 =
  39. 39.A train has 158 people in the front coaches and 204 people in the back coaches. How many people are on the train?
  40. 40.A school has 400 children. 246 of them are girls. How many boys are there?

Answer key

  1. 587
  2. 198
  3. 947
  4. 676
  5. 319
  6. 989
  7. 139
  8. 332
  9. 965
  10. 341
  11. 239
  12. 748
  13. 965
  14. 857
  15. 622
  16. 153
  17. 274
  18. 291
  19. 814
  20. 61
  21. 173
  22. 120
  23. 919
  24. 698
  25. 898
  26. 29
  27. 436
  28. 255
  29. 178
  30. 75
  31. 33
  32. 291
  33. 424
  34. 760
  35. 700
  36. 266
  37. 492
  38. 15
  39. 362
  40. 154

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