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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 306 · 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 386 children. 362 of them are girls. How many boys are there?
  2. 2.901 − 482 =
  3. 3.A school has 528 children. 214 of them are girls. How many boys are there?
  4. 4.482 + 490 =
  5. 5.A school has 709 children. 480 of them are girls. How many boys are there?
  6. 6.870 − 749 =
  7. 7.A train has 828 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  8. 8.538 − 511 =
  9. 9.756 − 447 =
  10. 10.A train has 744 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  11. 11.383 + 540 =
  12. 12.A school has 854 children. 224 of them are girls. How many boys are there?
  13. 13.? − 720 = 62
  14. 14.A school has 328 children. 103 of them are girls. How many boys are there?
  15. 15.464 − 364 =
  16. 16.? − 438 = 131
  17. 17.648 − ? = 459
  18. 18.414 + 194 =
  19. 19.146 + 118 =
  20. 20.266 + 456 =
  21. 21.626 + 352 =
  22. 22.A school has 434 children. 339 of them are girls. How many boys are there?
  23. 23.A train has 109 people in the front coaches and 664 people in the back coaches. How many people are on the train?
  24. 24.? + 674 = 919
  25. 25.? + 569 = 818
  26. 26.A school has 856 children. 415 of them are girls. How many boys are there?
  27. 27.A train has 714 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  28. 28.A school has 608 children. 496 of them are girls. How many boys are there?
  29. 29.273 + 143 =
  30. 30.A school has 649 children. 337 of them are girls. How many boys are there?
  31. 31.A train has 898 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  32. 32.761 + 195 =
  33. 33.A train has 670 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  34. 34.? − 110 = 273
  35. 35.? − 322 = 63
  36. 36.346 + 386 =
  37. 37.455 − 173 =
  38. 38.454 + 426 =
  39. 39.A train has 504 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  40. 40.? − 449 = 464

Answer key

  1. 24
  2. 419
  3. 314
  4. 972
  5. 229
  6. 121
  7. 945
  8. 27
  9. 309
  10. 853
  11. 923
  12. 630
  13. 782
  14. 225
  15. 100
  16. 569
  17. 189
  18. 608
  19. 264
  20. 722
  21. 978
  22. 95
  23. 773
  24. 245
  25. 249
  26. 441
  27. 860
  28. 112
  29. 416
  30. 312
  31. 999
  32. 956
  33. 812
  34. 383
  35. 385
  36. 732
  37. 282
  38. 880
  39. 755
  40. 913

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