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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 38 · 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. 1.737 + 247 =
  2. 2.411 + 342 =
  3. 3.A school has 424 children. 192 of them are girls. How many boys are there?
  4. 4.883 − 497 =
  5. 5.718 − 508 =
  6. 6.A train has 895 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  7. 7.493 − 459 =
  8. 8.A train has 852 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  9. 9.A train has 172 people in the front coaches and 611 people in the back coaches. How many people are on the train?
  10. 10.A train has 605 people in the front coaches and 362 people in the back coaches. How many people are on the train?
  11. 11.266 + 595 =
  12. 12.? + 341 = 653
  13. 13.784 − 762 =
  14. 14.876 − 809 =
  15. 15.301 − 299 =
  16. 16.A train has 302 people in the front coaches and 663 people in the back coaches. How many people are on the train?
  17. 17.847 + ? = 959
  18. 18.493 + 169 =
  19. 19.? − 459 = 186
  20. 20.? + 617 = 990
  21. 21.? − 660 = 154
  22. 22.447 − 254 =
  23. 23.A train has 884 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  24. 24.A school has 951 children. 438 of them are girls. How many boys are there?
  25. 25.? + 747 = 903
  26. 26.? − 198 = 627
  27. 27.787 − ? = 1
  28. 28.A train has 724 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  29. 29.513 − 396 =
  30. 30.840 − 710 =
  31. 31.A train has 819 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  32. 32.? − 386 = 42
  33. 33.A school has 916 children. 128 of them are girls. How many boys are there?
  34. 34.896 − ? = 626
  35. 35.437 + ? = 956
  36. 36.814 + ? = 919
  37. 37.? − 179 = 386
  38. 38.A train has 807 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  39. 39.? + 837 = 953
  40. 40.936 − 402 =

Answer key

  1. 984
  2. 753
  3. 232
  4. 386
  5. 210
  6. 995
  7. 34
  8. 957
  9. 783
  10. 967
  11. 861
  12. 312
  13. 22
  14. 67
  15. 2
  16. 965
  17. 112
  18. 662
  19. 645
  20. 373
  21. 814
  22. 193
  23. 997
  24. 513
  25. 156
  26. 825
  27. 786
  28. 882
  29. 117
  30. 130
  31. 955
  32. 428
  33. 788
  34. 270
  35. 519
  36. 105
  37. 565
  38. 925
  39. 116
  40. 534

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