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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 746 · 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 school has 746 children. 275 of them are girls. How many boys are there?
  2. 2.408 − 184 =
  3. 3.156 + 452 =
  4. 4.A train has 293 people in the front coaches and 411 people in the back coaches. How many people are on the train?
  5. 5.A train has 330 people in the front coaches and 603 people in the back coaches. How many people are on the train?
  6. 6.809 − 179 =
  7. 7.685 + 113 =
  8. 8.374 − ? = 255
  9. 9.579 + ? = 850
  10. 10.A school has 915 children. 357 of them are girls. How many boys are there?
  11. 11.A school has 444 children. 218 of them are girls. How many boys are there?
  12. 12.A school has 869 children. 436 of them are girls. How many boys are there?
  13. 13.A train has 556 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  14. 14.A school has 416 children. 152 of them are girls. How many boys are there?
  15. 15.A school has 338 children. 127 of them are girls. How many boys are there?
  16. 16.158 + 176 =
  17. 17.897 + ? = 998
  18. 18.381 − 310 =
  19. 19.623 + ? = 770
  20. 20.832 − ? = 175
  21. 21.A train has 792 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  22. 22.713 + 158 =
  23. 23.183 + ? = 687
  24. 24.892 + 100 =
  25. 25.? + 103 = 254
  26. 26.A train has 314 people in the front coaches and 654 people in the back coaches. How many people are on the train?
  27. 27.A train has 614 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  28. 28.A school has 823 children. 263 of them are girls. How many boys are there?
  29. 29.A train has 650 people in the front coaches and 229 people in the back coaches. How many people are on the train?
  30. 30.A train has 598 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  31. 31.747 + ? = 862
  32. 32.? − 528 = 95
  33. 33.822 − 592 =
  34. 34.678 + 232 =
  35. 35.356 + 201 =
  36. 36.653 + ? = 853
  37. 37.A train has 528 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  38. 38.308 + ? = 851
  39. 39.A train has 428 people in the front coaches and 219 people in the back coaches. How many people are on the train?
  40. 40.A school has 900 children. 416 of them are girls. How many boys are there?

Answer key

  1. 471
  2. 224
  3. 608
  4. 704
  5. 933
  6. 630
  7. 798
  8. 119
  9. 271
  10. 558
  11. 226
  12. 433
  13. 700
  14. 264
  15. 211
  16. 334
  17. 101
  18. 71
  19. 147
  20. 657
  21. 913
  22. 871
  23. 504
  24. 992
  25. 151
  26. 968
  27. 755
  28. 560
  29. 879
  30. 739
  31. 115
  32. 623
  33. 230
  34. 910
  35. 557
  36. 200
  37. 649
  38. 543
  39. 647
  40. 484

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