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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 616 · 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 397 people in the front coaches and 227 people in the back coaches. How many people are on the train?
  2. 2.A school has 594 children. 114 of them are girls. How many boys are there?
  3. 3.A train has 571 people in the front coaches and 296 people in the back coaches. How many people are on the train?
  4. 4.A school has 701 children. 501 of them are girls. How many boys are there?
  5. 5.A train has 296 people in the front coaches and 634 people in the back coaches. How many people are on the train?
  6. 6.A school has 312 children. 272 of them are girls. How many boys are there?
  7. 7.A school has 780 children. 241 of them are girls. How many boys are there?
  8. 8.? + 369 = 862
  9. 9.653 + ? = 906
  10. 10.? + 735 = 850
  11. 11.A train has 445 people in the front coaches and 538 people in the back coaches. How many people are on the train?
  12. 12.A train has 811 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  13. 13.A train has 691 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  14. 14.889 − 326 =
  15. 15.A school has 837 children. 542 of them are girls. How many boys are there?
  16. 16.537 − ? = 88
  17. 17.A train has 372 people in the front coaches and 327 people in the back coaches. How many people are on the train?
  18. 18.435 + 165 =
  19. 19.? − 413 = 227
  20. 20.796 + ? = 930
  21. 21.A school has 625 children. 402 of them are girls. How many boys are there?
  22. 22.190 + 222 =
  23. 23.A school has 869 children. 607 of them are girls. How many boys are there?
  24. 24.A school has 608 children. 293 of them are girls. How many boys are there?
  25. 25.411 − ? = 310
  26. 26.888 − 198 =
  27. 27.418 + ? = 645
  28. 28.571 + ? = 763
  29. 29.A train has 855 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  30. 30.818 − 127 =
  31. 31.A train has 100 people in the front coaches and 236 people in the back coaches. How many people are on the train?
  32. 32.688 − 125 =
  33. 33.A train has 499 people in the front coaches and 296 people in the back coaches. How many people are on the train?
  34. 34.746 − 147 =
  35. 35.420 + 286 =
  36. 36.704 + 164 =
  37. 37.773 + 175 =
  38. 38.588 + 401 =
  39. 39.447 − 178 =
  40. 40.918 − 248 =

Answer key

  1. 624
  2. 480
  3. 867
  4. 200
  5. 930
  6. 40
  7. 539
  8. 493
  9. 253
  10. 115
  11. 983
  12. 930
  13. 798
  14. 563
  15. 295
  16. 449
  17. 699
  18. 600
  19. 640
  20. 134
  21. 223
  22. 412
  23. 262
  24. 315
  25. 101
  26. 690
  27. 227
  28. 192
  29. 995
  30. 691
  31. 336
  32. 563
  33. 795
  34. 599
  35. 706
  36. 868
  37. 948
  38. 989
  39. 269
  40. 670

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