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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 892 · 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 school has 983 children. 520 of them are girls. How many boys are there?
  2. 2.A school has 881 children. 697 of them are girls. How many boys are there?
  3. 3.178 + ? = 556
  4. 4.? + 546 = 697
  5. 5.? − 154 = 639
  6. 6.242 − ? = 101
  7. 7.A train has 110 people in the front coaches and 376 people in the back coaches. How many people are on the train?
  8. 8.315 − ? = 33
  9. 9.162 + 746 =
  10. 10.? − 285 = 154
  11. 11.434 + 166 =
  12. 12.175 + 676 =
  13. 13.A train has 892 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  14. 14.? + 833 = 977
  15. 15.134 + 455 =
  16. 16.259 − 208 =
  17. 17.243 − 130 =
  18. 18.474 − ? = 218
  19. 19.723 − ? = 35
  20. 20.704 + 255 =
  21. 21.645 − 306 =
  22. 22.A school has 477 children. 133 of them are girls. How many boys are there?
  23. 23.861 − 230 =
  24. 24.284 + 599 =
  25. 25.? + 363 = 776
  26. 26.756 + 190 =
  27. 27.? − 412 = 44
  28. 28.A train has 451 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  29. 29.813 + 181 =
  30. 30.505 + ? = 771
  31. 31.A school has 632 children. 579 of them are girls. How many boys are there?
  32. 32.396 − 145 =
  33. 33.232 + 418 =
  34. 34.329 − 118 =
  35. 35.A train has 803 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  36. 36.A school has 618 children. 150 of them are girls. How many boys are there?
  37. 37.337 − 109 =
  38. 38.A school has 902 children. 496 of them are girls. How many boys are there?
  39. 39.A train has 515 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  40. 40.679 + 182 =

Answer key

  1. 463
  2. 184
  3. 378
  4. 151
  5. 793
  6. 141
  7. 486
  8. 282
  9. 908
  10. 439
  11. 600
  12. 851
  13. 992
  14. 144
  15. 589
  16. 51
  17. 113
  18. 256
  19. 688
  20. 959
  21. 339
  22. 344
  23. 631
  24. 883
  25. 413
  26. 946
  27. 456
  28. 633
  29. 994
  30. 266
  31. 53
  32. 251
  33. 650
  34. 211
  35. 940
  36. 468
  37. 228
  38. 406
  39. 645
  40. 861

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