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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 224 · 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. 1.690 + 113 =
  2. 2.836 + ? = 955
  3. 3.492 − ? = 255
  4. 4.A train has 485 people in the front coaches and 485 people in the back coaches. How many people are on the train?
  5. 5.959 − 935 =
  6. 6.A school has 211 children. 140 of them are girls. How many boys are there?
  7. 7.841 − ? = 412
  8. 8.A train has 311 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  9. 9.A school has 992 children. 917 of them are girls. How many boys are there?
  10. 10.773 + 138 =
  11. 11.309 − ? = 124
  12. 12.352 − 138 =
  13. 13.720 + 201 =
  14. 14.A school has 814 children. 356 of them are girls. How many boys are there?
  15. 15.278 + 197 =
  16. 16.668 + 331 =
  17. 17.731 + ? = 866
  18. 18.424 + ? = 647
  19. 19.A train has 528 people in the front coaches and 377 people in the back coaches. How many people are on the train?
  20. 20.? + 820 = 967
  21. 21.? + 364 = 995
  22. 22.202 + 631 =
  23. 23.429 − 362 =
  24. 24.A train has 776 people in the front coaches and 223 people in the back coaches. How many people are on the train?
  25. 25.293 + ? = 913
  26. 26.143 + 142 =
  27. 27.425 − 322 =
  28. 28.A school has 298 children. 147 of them are girls. How many boys are there?
  29. 29.A school has 272 children. 124 of them are girls. How many boys are there?
  30. 30.A train has 803 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  31. 31.616 − ? = 400
  32. 32.215 − 165 =
  33. 33.296 + 496 =
  34. 34.175 + 673 =
  35. 35.258 + ? = 486
  36. 36.? + 200 = 840
  37. 37.250 + 643 =
  38. 38.A train has 645 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  39. 39.A train has 826 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  40. 40.A train has 530 people in the front coaches and 115 people in the back coaches. How many people are on the train?

Answer key

  1. 803
  2. 119
  3. 237
  4. 970
  5. 24
  6. 71
  7. 429
  8. 458
  9. 75
  10. 911
  11. 185
  12. 214
  13. 921
  14. 458
  15. 475
  16. 999
  17. 135
  18. 223
  19. 905
  20. 147
  21. 631
  22. 833
  23. 67
  24. 999
  25. 620
  26. 285
  27. 103
  28. 151
  29. 148
  30. 903
  31. 216
  32. 50
  33. 792
  34. 848
  35. 228
  36. 640
  37. 893
  38. 907
  39. 988
  40. 645

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