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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 194 · 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. 1.364 − 113 =
  2. 2.A train has 461 people in the front coaches and 422 people in the back coaches. How many people are on the train?
  3. 3.504 + 410 =
  4. 4.A school has 270 children. 266 of them are girls. How many boys are there?
  5. 5.107 + ? = 210
  6. 6.A school has 820 children. 405 of them are girls. How many boys are there?
  7. 7.737 − ? = 468
  8. 8.? − 142 = 110
  9. 9.A school has 226 children. 216 of them are girls. How many boys are there?
  10. 10.280 + 442 =
  11. 11.? − 396 = 2
  12. 12.A school has 447 children. 108 of them are girls. How many boys are there?
  13. 13.A train has 223 people in the front coaches and 758 people in the back coaches. How many people are on the train?
  14. 14.A school has 329 children. 171 of them are girls. How many boys are there?
  15. 15.593 + ? = 714
  16. 16.156 + ? = 326
  17. 17.A train has 603 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  18. 18.684 − 435 =
  19. 19.A train has 840 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  20. 20.A train has 345 people in the front coaches and 319 people in the back coaches. How many people are on the train?
  21. 21.A school has 728 children. 174 of them are girls. How many boys are there?
  22. 22.217 + 615 =
  23. 23.758 + 232 =
  24. 24.129 + ? = 619
  25. 25.679 + ? = 937
  26. 26.473 + 338 =
  27. 27.A train has 853 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  28. 28.245 − ? = 76
  29. 29.461 + 529 =
  30. 30.A train has 569 people in the front coaches and 410 people in the back coaches. How many people are on the train?
  31. 31.511 + 219 =
  32. 32.A school has 457 children. 168 of them are girls. How many boys are there?
  33. 33.537 − 389 =
  34. 34.961 − ? = 433
  35. 35.540 + ? = 876
  36. 36.? + 157 = 976
  37. 37.A train has 206 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  38. 38.A school has 968 children. 450 of them are girls. How many boys are there?
  39. 39.870 − 171 =
  40. 40.342 − ? = 102

Answer key

  1. 251
  2. 883
  3. 914
  4. 4
  5. 103
  6. 415
  7. 269
  8. 252
  9. 10
  10. 722
  11. 398
  12. 339
  13. 981
  14. 158
  15. 121
  16. 170
  17. 814
  18. 249
  19. 965
  20. 664
  21. 554
  22. 832
  23. 990
  24. 490
  25. 258
  26. 811
  27. 982
  28. 169
  29. 990
  30. 979
  31. 730
  32. 289
  33. 148
  34. 528
  35. 336
  36. 819
  37. 424
  38. 518
  39. 699
  40. 240

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