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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 454 · 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 404 children. 167 of them are girls. How many boys are there?
  2. 2.807 − ? = 475
  3. 3.A train has 773 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  4. 4.A train has 121 people in the front coaches and 612 people in the back coaches. How many people are on the train?
  5. 5.723 − 439 =
  6. 6.A school has 293 children. 196 of them are girls. How many boys are there?
  7. 7.A train has 167 people in the front coaches and 361 people in the back coaches. How many people are on the train?
  8. 8.838 − 313 =
  9. 9.514 + 261 =
  10. 10.A train has 822 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  11. 11.343 − 307 =
  12. 12.A train has 660 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  13. 13.529 − ? = 316
  14. 14.? + 231 = 889
  15. 15.481 − ? = 60
  16. 16.A school has 581 children. 352 of them are girls. How many boys are there?
  17. 17.? + 445 = 563
  18. 18.A school has 930 children. 524 of them are girls. How many boys are there?
  19. 19.? − 439 = 451
  20. 20.A train has 811 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  21. 21.734 + ? = 994
  22. 22.? − 168 = 548
  23. 23.A school has 749 children. 742 of them are girls. How many boys are there?
  24. 24.171 + 353 =
  25. 25.718 − 101 =
  26. 26.? + 579 = 691
  27. 27.A train has 538 people in the front coaches and 401 people in the back coaches. How many people are on the train?
  28. 28.814 − ? = 653
  29. 29.A train has 227 people in the front coaches and 540 people in the back coaches. How many people are on the train?
  30. 30.A school has 824 children. 179 of them are girls. How many boys are there?
  31. 31.A train has 424 people in the front coaches and 321 people in the back coaches. How many people are on the train?
  32. 32.? − 189 = 76
  33. 33.A train has 317 people in the front coaches and 501 people in the back coaches. How many people are on the train?
  34. 34.A train has 734 people in the front coaches and 264 people in the back coaches. How many people are on the train?
  35. 35.A school has 824 children. 308 of them are girls. How many boys are there?
  36. 36.A school has 941 children. 535 of them are girls. How many boys are there?
  37. 37.A train has 561 people in the front coaches and 331 people in the back coaches. How many people are on the train?
  38. 38.640 + 106 =
  39. 39.? − 180 = 438
  40. 40.376 + 526 =

Answer key

  1. 237
  2. 332
  3. 873
  4. 733
  5. 284
  6. 97
  7. 528
  8. 525
  9. 775
  10. 968
  11. 36
  12. 841
  13. 213
  14. 658
  15. 421
  16. 229
  17. 118
  18. 406
  19. 890
  20. 968
  21. 260
  22. 716
  23. 7
  24. 524
  25. 617
  26. 112
  27. 939
  28. 161
  29. 767
  30. 645
  31. 745
  32. 265
  33. 818
  34. 998
  35. 516
  36. 406
  37. 892
  38. 746
  39. 618
  40. 902

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