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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 882 · 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. 1.875 + 117 =
  2. 2.435 + 234 =
  3. 3.A school has 367 children. 100 of them are girls. How many boys are there?
  4. 4.386 − ? = 47
  5. 5.823 + 121 =
  6. 6.365 + 173 =
  7. 7.A school has 853 children. 529 of them are girls. How many boys are there?
  8. 8.237 + 498 =
  9. 9.A train has 489 people in the front coaches and 388 people in the back coaches. How many people are on the train?
  10. 10.673 − ? = 91
  11. 11.714 + 124 =
  12. 12.505 + 214 =
  13. 13.A train has 744 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  14. 14.? − 143 = 685
  15. 15.620 + ? = 746
  16. 16.A school has 817 children. 252 of them are girls. How many boys are there?
  17. 17.762 + ? = 986
  18. 18.424 − 240 =
  19. 19.A school has 726 children. 433 of them are girls. How many boys are there?
  20. 20.A school has 674 children. 155 of them are girls. How many boys are there?
  21. 21.596 + ? = 746
  22. 22.A train has 402 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  23. 23.A train has 163 people in the front coaches and 745 people in the back coaches. How many people are on the train?
  24. 24.427 + ? = 535
  25. 25.490 + ? = 590
  26. 26.? − 303 = 659
  27. 27.A train has 872 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  28. 28.A train has 141 people in the front coaches and 269 people in the back coaches. How many people are on the train?
  29. 29.A school has 938 children. 489 of them are girls. How many boys are there?
  30. 30.? + 113 = 938
  31. 31.388 + 100 =
  32. 32.A school has 712 children. 338 of them are girls. How many boys are there?
  33. 33.? − 468 = 158
  34. 34.735 + ? = 842
  35. 35.817 + 101 =
  36. 36.? − 288 = 262
  37. 37.A school has 679 children. 593 of them are girls. How many boys are there?
  38. 38.A train has 679 people in the front coaches and 242 people in the back coaches. How many people are on the train?
  39. 39.A train has 140 people in the front coaches and 833 people in the back coaches. How many people are on the train?
  40. 40.A school has 924 children. 689 of them are girls. How many boys are there?

Answer key

  1. 992
  2. 669
  3. 267
  4. 339
  5. 944
  6. 538
  7. 324
  8. 735
  9. 877
  10. 582
  11. 838
  12. 719
  13. 845
  14. 828
  15. 126
  16. 565
  17. 224
  18. 184
  19. 293
  20. 519
  21. 150
  22. 564
  23. 908
  24. 108
  25. 100
  26. 962
  27. 995
  28. 410
  29. 449
  30. 825
  31. 488
  32. 374
  33. 626
  34. 107
  35. 918
  36. 550
  37. 86
  38. 921
  39. 973
  40. 235

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