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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 556 · 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.? + 395 = 588
  2. 2.472 − 468 =
  3. 3.A school has 451 children. 216 of them are girls. How many boys are there?
  4. 4.424 − 343 =
  5. 5.956 − 132 =
  6. 6.A school has 580 children. 512 of them are girls. How many boys are there?
  7. 7.940 − ? = 760
  8. 8.119 + ? = 882
  9. 9.485 + 441 =
  10. 10.672 − 125 =
  11. 11.A train has 498 people in the front coaches and 499 people in the back coaches. How many people are on the train?
  12. 12.A school has 857 children. 577 of them are girls. How many boys are there?
  13. 13.A train has 405 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  14. 14.992 − 476 =
  15. 15.810 + ? = 930
  16. 16.? + 693 = 802
  17. 17.? − 179 = 737
  18. 18.760 − 150 =
  19. 19.A train has 784 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  20. 20.271 + 552 =
  21. 21.A school has 589 children. 400 of them are girls. How many boys are there?
  22. 22.577 − 142 =
  23. 23.430 − ? = 95
  24. 24.A school has 605 children. 411 of them are girls. How many boys are there?
  25. 25.820 + 119 =
  26. 26.446 − 207 =
  27. 27.928 − 288 =
  28. 28.568 + 238 =
  29. 29.A school has 339 children. 125 of them are girls. How many boys are there?
  30. 30.A school has 259 children. 195 of them are girls. How many boys are there?
  31. 31.801 + 190 =
  32. 32.A school has 343 children. 250 of them are girls. How many boys are there?
  33. 33.A school has 939 children. 639 of them are girls. How many boys are there?
  34. 34.403 − 280 =
  35. 35.493 + 146 =
  36. 36.A school has 540 children. 400 of them are girls. How many boys are there?
  37. 37.507 + 477 =
  38. 38.? + 426 = 850
  39. 39.A school has 288 children. 167 of them are girls. How many boys are there?
  40. 40.589 + 366 =

Answer key

  1. 193
  2. 4
  3. 235
  4. 81
  5. 824
  6. 68
  7. 180
  8. 763
  9. 926
  10. 547
  11. 997
  12. 280
  13. 808
  14. 516
  15. 120
  16. 109
  17. 916
  18. 610
  19. 898
  20. 823
  21. 189
  22. 435
  23. 335
  24. 194
  25. 939
  26. 239
  27. 640
  28. 806
  29. 214
  30. 64
  31. 991
  32. 93
  33. 300
  34. 123
  35. 639
  36. 140
  37. 984
  38. 424
  39. 121
  40. 955

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