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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 216 · 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. 1.636 + 338 =
  2. 2.490 − 262 =
  3. 3.A school has 807 children. 155 of them are girls. How many boys are there?
  4. 4.727 − 336 =
  5. 5.A school has 883 children. 296 of them are girls. How many boys are there?
  6. 6.380 + 571 =
  7. 7.888 + 103 =
  8. 8.190 + 150 =
  9. 9.A school has 703 children. 166 of them are girls. How many boys are there?
  10. 10.? − 278 = 520
  11. 11.A school has 620 children. 176 of them are girls. How many boys are there?
  12. 12.A school has 254 children. 248 of them are girls. How many boys are there?
  13. 13.595 + 354 =
  14. 14.A train has 365 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  15. 15.724 − 465 =
  16. 16.? − 342 = 64
  17. 17.? + 119 = 346
  18. 18.220 + 132 =
  19. 19.A school has 321 children. 306 of them are girls. How many boys are there?
  20. 20.340 + 221 =
  21. 21.A school has 323 children. 132 of them are girls. How many boys are there?
  22. 22.749 − 284 =
  23. 23.A train has 324 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  24. 24.856 − 313 =
  25. 25.A train has 272 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  26. 26.131 + 515 =
  27. 27.110 + ? = 519
  28. 28.? + 552 = 860
  29. 29.897 + 102 =
  30. 30.830 − 226 =
  31. 31.A school has 996 children. 367 of them are girls. How many boys are there?
  32. 32.543 + 126 =
  33. 33.A school has 498 children. 248 of them are girls. How many boys are there?
  34. 34.A school has 549 children. 437 of them are girls. How many boys are there?
  35. 35.A school has 352 children. 199 of them are girls. How many boys are there?
  36. 36.352 + 378 =
  37. 37.A school has 401 children. 338 of them are girls. How many boys are there?
  38. 38.? − 254 = 123
  39. 39.? + 844 = 998
  40. 40.A train has 446 people in the front coaches and 479 people in the back coaches. How many people are on the train?

Answer key

  1. 974
  2. 228
  3. 652
  4. 391
  5. 587
  6. 951
  7. 991
  8. 340
  9. 537
  10. 798
  11. 444
  12. 6
  13. 949
  14. 555
  15. 259
  16. 406
  17. 227
  18. 352
  19. 15
  20. 561
  21. 191
  22. 465
  23. 976
  24. 543
  25. 390
  26. 646
  27. 409
  28. 308
  29. 999
  30. 604
  31. 629
  32. 669
  33. 250
  34. 112
  35. 153
  36. 730
  37. 63
  38. 377
  39. 154
  40. 925

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