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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 767 · 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 750 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  2. 2.? − 141 = 291
  3. 3.? − 126 = 506
  4. 4.A train has 105 people in the front coaches and 678 people in the back coaches. How many people are on the train?
  5. 5.693 + ? = 794
  6. 6.? + 275 = 597
  7. 7.A train has 888 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  8. 8.? + 350 = 464
  9. 9.A school has 242 children. 228 of them are girls. How many boys are there?
  10. 10.A school has 658 children. 392 of them are girls. How many boys are there?
  11. 11.A school has 564 children. 371 of them are girls. How many boys are there?
  12. 12.335 − 148 =
  13. 13.795 + ? = 956
  14. 14.244 − 111 =
  15. 15.A school has 774 children. 527 of them are girls. How many boys are there?
  16. 16.785 − 244 =
  17. 17.503 − ? = 182
  18. 18.A train has 480 people in the front coaches and 421 people in the back coaches. How many people are on the train?
  19. 19.? − 453 = 433
  20. 20.A train has 804 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  21. 21.557 + ? = 692
  22. 22.A school has 233 children. 118 of them are girls. How many boys are there?
  23. 23.? − 531 = 68
  24. 24.? − 320 = 105
  25. 25.? − 405 = 110
  26. 26.A school has 544 children. 202 of them are girls. How many boys are there?
  27. 27.A train has 767 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  28. 28.A school has 413 children. 231 of them are girls. How many boys are there?
  29. 29.A train has 899 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  30. 30.A school has 424 children. 336 of them are girls. How many boys are there?
  31. 31.A train has 834 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  32. 32.A train has 396 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  33. 33.? − 333 = 128
  34. 34.602 + 263 =
  35. 35.240 + 588 =
  36. 36.242 − 189 =
  37. 37.335 + ? = 563
  38. 38.A train has 862 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  39. 39.982 − ? = 717
  40. 40.534 + 165 =

Answer key

  1. 968
  2. 432
  3. 632
  4. 783
  5. 101
  6. 322
  7. 998
  8. 114
  9. 14
  10. 266
  11. 193
  12. 187
  13. 161
  14. 133
  15. 247
  16. 541
  17. 321
  18. 901
  19. 886
  20. 963
  21. 135
  22. 115
  23. 599
  24. 425
  25. 515
  26. 342
  27. 946
  28. 182
  29. 999
  30. 88
  31. 963
  32. 540
  33. 461
  34. 865
  35. 828
  36. 53
  37. 228
  38. 997
  39. 265
  40. 699

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