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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 964 · 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. 1.239 + ? = 866
  2. 2.A train has 422 people in the front coaches and 189 people in the back coaches. How many people are on the train?
  3. 3.? + 362 = 529
  4. 4.A train has 525 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  5. 5.A train has 110 people in the front coaches and 604 people in the back coaches. How many people are on the train?
  6. 6.? + 897 = 997
  7. 7.614 + ? = 767
  8. 8.136 + 103 =
  9. 9.390 + 122 =
  10. 10.A train has 407 people in the front coaches and 561 people in the back coaches. How many people are on the train?
  11. 11.? + 812 = 917
  12. 12.A train has 427 people in the front coaches and 488 people in the back coaches. How many people are on the train?
  13. 13.312 − 114 =
  14. 14.218 + ? = 582
  15. 15.963 − ? = 655
  16. 16.A train has 161 people in the front coaches and 755 people in the back coaches. How many people are on the train?
  17. 17.463 − ? = 75
  18. 18.? + 488 = 685
  19. 19.150 + 710 =
  20. 20.505 + 132 =
  21. 21.A train has 281 people in the front coaches and 540 people in the back coaches. How many people are on the train?
  22. 22.A school has 227 children. 110 of them are girls. How many boys are there?
  23. 23.248 + ? = 879
  24. 24.360 + 313 =
  25. 25.720 + 139 =
  26. 26.952 − ? = 190
  27. 27.502 − 246 =
  28. 28.? − 286 = 489
  29. 29.569 + ? = 752
  30. 30.A train has 631 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  31. 31.A school has 657 children. 425 of them are girls. How many boys are there?
  32. 32.? − 154 = 561
  33. 33.A school has 320 children. 145 of them are girls. How many boys are there?
  34. 34.A train has 486 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  35. 35.A school has 588 children. 161 of them are girls. How many boys are there?
  36. 36.805 + 122 =
  37. 37.? + 323 = 788
  38. 38.176 + 813 =
  39. 39.861 + ? = 984
  40. 40.? + 751 = 962

Answer key

  1. 627
  2. 611
  3. 167
  4. 808
  5. 714
  6. 100
  7. 153
  8. 239
  9. 512
  10. 968
  11. 105
  12. 915
  13. 198
  14. 364
  15. 308
  16. 916
  17. 388
  18. 197
  19. 860
  20. 637
  21. 821
  22. 117
  23. 631
  24. 673
  25. 859
  26. 762
  27. 256
  28. 775
  29. 183
  30. 832
  31. 232
  32. 715
  33. 175
  34. 621
  35. 427
  36. 927
  37. 465
  38. 989
  39. 123
  40. 211

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