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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 758 · 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 331 people in the front coaches and 572 people in the back coaches. How many people are on the train?
  2. 2.A school has 641 children. 307 of them are girls. How many boys are there?
  3. 3.A school has 877 children. 155 of them are girls. How many boys are there?
  4. 4.463 + ? = 851
  5. 5.413 − ? = 309
  6. 6.706 − ? = 534
  7. 7.A school has 939 children. 215 of them are girls. How many boys are there?
  8. 8.A train has 874 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  9. 9.A train has 465 people in the front coaches and 267 people in the back coaches. How many people are on the train?
  10. 10.A school has 825 children. 209 of them are girls. How many boys are there?
  11. 11.691 − 290 =
  12. 12.A train has 241 people in the front coaches and 498 people in the back coaches. How many people are on the train?
  13. 13.230 + 128 =
  14. 14.650 − 452 =
  15. 15.191 + ? = 933
  16. 16.383 + ? = 500
  17. 17.714 + 243 =
  18. 18.778 − 217 =
  19. 19.A train has 894 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  20. 20.223 − 168 =
  21. 21.A school has 200 children. 121 of them are girls. How many boys are there?
  22. 22.756 + 123 =
  23. 23.? + 445 = 738
  24. 24.463 − 373 =
  25. 25.A school has 821 children. 195 of them are girls. How many boys are there?
  26. 26.A train has 261 people in the front coaches and 173 people in the back coaches. How many people are on the train?
  27. 27.A school has 816 children. 651 of them are girls. How many boys are there?
  28. 28.A school has 656 children. 147 of them are girls. How many boys are there?
  29. 29.A train has 683 people in the front coaches and 265 people in the back coaches. How many people are on the train?
  30. 30.? − 420 = 49
  31. 31.A school has 338 children. 243 of them are girls. How many boys are there?
  32. 32.989 − 124 =
  33. 33.? + 345 = 728
  34. 34.375 + 468 =
  35. 35.832 − ? = 95
  36. 36.150 + ? = 300
  37. 37.820 − 742 =
  38. 38.835 + 149 =
  39. 39.110 + 623 =
  40. 40.543 − 280 =

Answer key

  1. 903
  2. 334
  3. 722
  4. 388
  5. 104
  6. 172
  7. 724
  8. 982
  9. 732
  10. 616
  11. 401
  12. 739
  13. 358
  14. 198
  15. 742
  16. 117
  17. 957
  18. 561
  19. 994
  20. 55
  21. 79
  22. 879
  23. 293
  24. 90
  25. 626
  26. 434
  27. 165
  28. 509
  29. 948
  30. 469
  31. 95
  32. 865
  33. 383
  34. 843
  35. 737
  36. 150
  37. 78
  38. 984
  39. 733
  40. 263

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