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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 49 · 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. 1.516 + 206 =
  2. 2.A train has 523 people in the front coaches and 445 people in the back coaches. How many people are on the train?
  3. 3.A train has 639 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  4. 4.A school has 416 children. 226 of them are girls. How many boys are there?
  5. 5.494 + ? = 784
  6. 6.A school has 770 children. 571 of them are girls. How many boys are there?
  7. 7.A train has 200 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  8. 8.A train has 562 people in the front coaches and 416 people in the back coaches. How many people are on the train?
  9. 9.A school has 201 children. 114 of them are girls. How many boys are there?
  10. 10.A school has 306 children. 153 of them are girls. How many boys are there?
  11. 11.A school has 260 children. 162 of them are girls. How many boys are there?
  12. 12.A train has 480 people in the front coaches and 375 people in the back coaches. How many people are on the train?
  13. 13.? + 300 = 750
  14. 14.168 + 776 =
  15. 15.867 − 679 =
  16. 16.A train has 538 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  17. 17.A school has 219 children. 181 of them are girls. How many boys are there?
  18. 18.604 + 294 =
  19. 19.A school has 574 children. 471 of them are girls. How many boys are there?
  20. 20.A school has 901 children. 452 of them are girls. How many boys are there?
  21. 21.A train has 861 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  22. 22.A train has 268 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  23. 23.A school has 948 children. 148 of them are girls. How many boys are there?
  24. 24.A school has 365 children. 108 of them are girls. How many boys are there?
  25. 25.466 + 282 =
  26. 26.A train has 639 people in the front coaches and 274 people in the back coaches. How many people are on the train?
  27. 27.? + 117 = 892
  28. 28.A school has 434 children. 346 of them are girls. How many boys are there?
  29. 29.146 + 765 =
  30. 30.? + 686 = 980
  31. 31.A school has 271 children. 101 of them are girls. How many boys are there?
  32. 32.665 − 173 =
  33. 33.158 + 775 =
  34. 34.A train has 632 people in the front coaches and 304 people in the back coaches. How many people are on the train?
  35. 35.A train has 724 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  36. 36.382 − 275 =
  37. 37.284 − 170 =
  38. 38.886 + 107 =
  39. 39.250 + 148 =
  40. 40.531 − 455 =

Answer key

  1. 722
  2. 968
  3. 922
  4. 190
  5. 290
  6. 199
  7. 724
  8. 978
  9. 87
  10. 153
  11. 98
  12. 855
  13. 450
  14. 944
  15. 188
  16. 684
  17. 38
  18. 898
  19. 103
  20. 449
  21. 977
  22. 427
  23. 800
  24. 257
  25. 748
  26. 913
  27. 775
  28. 88
  29. 911
  30. 294
  31. 170
  32. 492
  33. 933
  34. 936
  35. 898
  36. 107
  37. 114
  38. 993
  39. 398
  40. 76

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