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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 436 · 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 train has 898 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  2. 2.627 + ? = 910
  3. 3.214 − 171 =
  4. 4.707 + 100 =
  5. 5.? + 210 = 736
  6. 6.A school has 565 children. 119 of them are girls. How many boys are there?
  7. 7.A school has 872 children. 352 of them are girls. How many boys are there?
  8. 8.? − 476 = 235
  9. 9.A school has 574 children. 430 of them are girls. How many boys are there?
  10. 10.A train has 640 people in the front coaches and 287 people in the back coaches. How many people are on the train?
  11. 11.A train has 132 people in the front coaches and 313 people in the back coaches. How many people are on the train?
  12. 12.? − 255 = 712
  13. 13.591 + ? = 843
  14. 14.A school has 449 children. 234 of them are girls. How many boys are there?
  15. 15.A school has 205 children. 163 of them are girls. How many boys are there?
  16. 16.694 − 471 =
  17. 17.A train has 405 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  18. 18.319 − 261 =
  19. 19.600 − 363 =
  20. 20.A school has 370 children. 121 of them are girls. How many boys are there?
  21. 21.929 − ? = 575
  22. 22.767 + ? = 900
  23. 23.628 − ? = 256
  24. 24.664 − 458 =
  25. 25.A train has 171 people in the front coaches and 733 people in the back coaches. How many people are on the train?
  26. 26.? − 155 = 348
  27. 27.A school has 779 children. 329 of them are girls. How many boys are there?
  28. 28.741 + 165 =
  29. 29.A train has 551 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  30. 30.686 − ? = 239
  31. 31.279 − 274 =
  32. 32.A school has 900 children. 274 of them are girls. How many boys are there?
  33. 33.316 + ? = 945
  34. 34.351 + ? = 952
  35. 35.613 − 455 =
  36. 36.? + 659 = 846
  37. 37.194 + 782 =
  38. 38.254 − 119 =
  39. 39.A train has 230 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  40. 40.361 + 157 =

Answer key

  1. 999
  2. 283
  3. 43
  4. 807
  5. 526
  6. 446
  7. 520
  8. 711
  9. 144
  10. 927
  11. 445
  12. 967
  13. 252
  14. 215
  15. 42
  16. 223
  17. 517
  18. 58
  19. 237
  20. 249
  21. 354
  22. 133
  23. 372
  24. 206
  25. 904
  26. 503
  27. 450
  28. 906
  29. 684
  30. 447
  31. 5
  32. 626
  33. 629
  34. 601
  35. 158
  36. 187
  37. 976
  38. 135
  39. 484
  40. 518

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