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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 768 · 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. 1.386 + 585 =
  2. 2.260 − ? = 126
  3. 3.355 + ? = 957
  4. 4.A school has 259 children. 204 of them are girls. How many boys are there?
  5. 5.A train has 174 people in the front coaches and 300 people in the back coaches. How many people are on the train?
  6. 6.668 + ? = 810
  7. 7.196 + 488 =
  8. 8.? − 134 = 186
  9. 9.A train has 329 people in the front coaches and 640 people in the back coaches. How many people are on the train?
  10. 10.A train has 272 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  11. 11.A train has 363 people in the front coaches and 523 people in the back coaches. How many people are on the train?
  12. 12.471 − 233 =
  13. 13.207 − ? = 75
  14. 14.909 − 674 =
  15. 15.650 − 485 =
  16. 16.? + 539 = 958
  17. 17.693 − 102 =
  18. 18.764 − 737 =
  19. 19.A school has 297 children. 154 of them are girls. How many boys are there?
  20. 20.498 − 461 =
  21. 21.A train has 841 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  22. 22.360 + ? = 869
  23. 23.594 − ? = 416
  24. 24.866 + ? = 974
  25. 25.248 − 247 =
  26. 26.392 + 265 =
  27. 27.612 + ? = 816
  28. 28.660 − 634 =
  29. 29.669 + ? = 780
  30. 30.A train has 852 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  31. 31.A school has 351 children. 138 of them are girls. How many boys are there?
  32. 32.457 + 352 =
  33. 33.795 + ? = 956
  34. 34.447 + 120 =
  35. 35.678 − 403 =
  36. 36.A train has 616 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  37. 37.A train has 585 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  38. 38.327 − 199 =
  39. 39.220 + ? = 576
  40. 40.204 + 156 =

Answer key

  1. 971
  2. 134
  3. 602
  4. 55
  5. 474
  6. 142
  7. 684
  8. 320
  9. 969
  10. 408
  11. 886
  12. 238
  13. 132
  14. 235
  15. 165
  16. 419
  17. 591
  18. 27
  19. 143
  20. 37
  21. 949
  22. 509
  23. 178
  24. 108
  25. 1
  26. 657
  27. 204
  28. 26
  29. 111
  30. 959
  31. 213
  32. 809
  33. 161
  34. 567
  35. 275
  36. 762
  37. 711
  38. 128
  39. 356
  40. 360

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