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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 862 · 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. 1.927 − ? = 463
  2. 2.? + 293 = 595
  3. 3.207 + 656 =
  4. 4.561 + 172 =
  5. 5.825 + ? = 932
  6. 6.A school has 953 children. 764 of them are girls. How many boys are there?
  7. 7.100 + 742 =
  8. 8.816 + 163 =
  9. 9.A train has 361 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  10. 10.? + 207 = 725
  11. 11.535 − 423 =
  12. 12.A train has 646 people in the front coaches and 308 people in the back coaches. How many people are on the train?
  13. 13.892 − 244 =
  14. 14.225 − 134 =
  15. 15.575 + 402 =
  16. 16.A train has 562 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  17. 17.139 + 818 =
  18. 18.A train has 267 people in the front coaches and 429 people in the back coaches. How many people are on the train?
  19. 19.852 − 443 =
  20. 20.661 + 121 =
  21. 21.630 − 461 =
  22. 22.695 − 208 =
  23. 23.A school has 654 children. 331 of them are girls. How many boys are there?
  24. 24.226 + ? = 631
  25. 25.? − 113 = 420
  26. 26.? + 632 = 797
  27. 27.686 + ? = 960
  28. 28.? + 763 = 878
  29. 29.A train has 310 people in the front coaches and 475 people in the back coaches. How many people are on the train?
  30. 30.A school has 416 children. 333 of them are girls. How many boys are there?
  31. 31.A train has 849 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  32. 32.A train has 110 people in the front coaches and 812 people in the back coaches. How many people are on the train?
  33. 33.A school has 250 children. 237 of them are girls. How many boys are there?
  34. 34.637 − ? = 427
  35. 35.631 + ? = 870
  36. 36.A train has 856 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  37. 37.624 − 294 =
  38. 38.? + 131 = 894
  39. 39.A train has 239 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  40. 40.434 − 298 =

Answer key

  1. 464
  2. 302
  3. 863
  4. 733
  5. 107
  6. 189
  7. 842
  8. 979
  9. 629
  10. 518
  11. 112
  12. 954
  13. 648
  14. 91
  15. 977
  16. 669
  17. 957
  18. 696
  19. 409
  20. 782
  21. 169
  22. 487
  23. 323
  24. 405
  25. 533
  26. 165
  27. 274
  28. 115
  29. 785
  30. 83
  31. 978
  32. 922
  33. 13
  34. 210
  35. 239
  36. 963
  37. 330
  38. 763
  39. 431
  40. 136

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