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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 181 · 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. 1.879 + 104 =
  2. 2.? − 151 = 241
  3. 3.A school has 392 children. 179 of them are girls. How many boys are there?
  4. 4.A school has 972 children. 733 of them are girls. How many boys are there?
  5. 5.A train has 562 people in the front coaches and 274 people in the back coaches. How many people are on the train?
  6. 6.? + 178 = 936
  7. 7.934 − 566 =
  8. 8.A school has 587 children. 570 of them are girls. How many boys are there?
  9. 9.A train has 748 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  10. 10.311 − 305 =
  11. 11.740 + ? = 983
  12. 12.337 + 539 =
  13. 13.A school has 399 children. 262 of them are girls. How many boys are there?
  14. 14.298 + 621 =
  15. 15.353 + 556 =
  16. 16.A school has 895 children. 845 of them are girls. How many boys are there?
  17. 17.386 − ? = 15
  18. 18.A train has 209 people in the front coaches and 265 people in the back coaches. How many people are on the train?
  19. 19.310 − ? = 4
  20. 20.? − 181 = 34
  21. 21.A school has 775 children. 100 of them are girls. How many boys are there?
  22. 22.A train has 701 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  23. 23.A school has 227 children. 163 of them are girls. How many boys are there?
  24. 24.A school has 386 children. 213 of them are girls. How many boys are there?
  25. 25.453 − ? = 67
  26. 26.A school has 692 children. 646 of them are girls. How many boys are there?
  27. 27.A school has 791 children. 385 of them are girls. How many boys are there?
  28. 28.749 − 722 =
  29. 29.A train has 545 people in the front coaches and 199 people in the back coaches. How many people are on the train?
  30. 30.860 + 122 =
  31. 31.A school has 881 children. 411 of them are girls. How many boys are there?
  32. 32.A train has 539 people in the front coaches and 355 people in the back coaches. How many people are on the train?
  33. 33.742 − 140 =
  34. 34.894 + 105 =
  35. 35.818 − ? = 341
  36. 36.A school has 298 children. 163 of them are girls. How many boys are there?
  37. 37.A school has 976 children. 281 of them are girls. How many boys are there?
  38. 38.? − 278 = 273
  39. 39.? + 800 = 919
  40. 40.251 + 306 =

Answer key

  1. 983
  2. 392
  3. 213
  4. 239
  5. 836
  6. 758
  7. 368
  8. 17
  9. 859
  10. 6
  11. 243
  12. 876
  13. 137
  14. 919
  15. 909
  16. 50
  17. 371
  18. 474
  19. 306
  20. 215
  21. 675
  22. 818
  23. 64
  24. 173
  25. 386
  26. 46
  27. 406
  28. 27
  29. 744
  30. 982
  31. 470
  32. 894
  33. 602
  34. 999
  35. 477
  36. 135
  37. 695
  38. 551
  39. 119
  40. 557

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