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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 498 · 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. 1.828 + 140 =
  2. 2.? − 812 = 97
  3. 3.A school has 211 children. 172 of them are girls. How many boys are there?
  4. 4.? − 854 = 24
  5. 5.A train has 290 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  6. 6.819 + 112 =
  7. 7.836 − 129 =
  8. 8.? − 499 = 27
  9. 9.? + 189 = 930
  10. 10.454 + 101 =
  11. 11.A train has 570 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  12. 12.? + 779 = 947
  13. 13.580 − ? = 429
  14. 14.A train has 803 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  15. 15.A school has 988 children. 191 of them are girls. How many boys are there?
  16. 16.361 + 459 =
  17. 17.563 − ? = 406
  18. 18.A school has 770 children. 168 of them are girls. How many boys are there?
  19. 19.301 − ? = 173
  20. 20.229 + 581 =
  21. 21.299 + 279 =
  22. 22.809 + 105 =
  23. 23.815 − ? = 116
  24. 24.323 + 604 =
  25. 25.281 − 254 =
  26. 26.791 + 103 =
  27. 27.? + 614 = 763
  28. 28.812 − 227 =
  29. 29.A school has 800 children. 135 of them are girls. How many boys are there?
  30. 30.119 + 723 =
  31. 31.A train has 744 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  32. 32.? + 293 = 565
  33. 33.757 + ? = 976
  34. 34.A school has 999 children. 673 of them are girls. How many boys are there?
  35. 35.245 − 138 =
  36. 36.366 − 301 =
  37. 37.587 + 137 =
  38. 38.954 − 134 =
  39. 39.? − 192 = 239
  40. 40.560 + ? = 743

Answer key

  1. 968
  2. 909
  3. 39
  4. 878
  5. 492
  6. 931
  7. 707
  8. 526
  9. 741
  10. 555
  11. 751
  12. 168
  13. 151
  14. 921
  15. 797
  16. 820
  17. 157
  18. 602
  19. 128
  20. 810
  21. 578
  22. 914
  23. 699
  24. 927
  25. 27
  26. 894
  27. 149
  28. 585
  29. 665
  30. 842
  31. 923
  32. 272
  33. 219
  34. 326
  35. 107
  36. 65
  37. 724
  38. 820
  39. 431
  40. 183

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