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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 704 · 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. 1.609 + 336 =
  2. 2.A school has 522 children. 288 of them are girls. How many boys are there?
  3. 3.500 − ? = 350
  4. 4.200 − ? = 88
  5. 5.A school has 862 children. 755 of them are girls. How many boys are there?
  6. 6.900 − 604 =
  7. 7.805 − 774 =
  8. 8.416 − 109 =
  9. 9.A train has 115 people in the front coaches and 562 people in the back coaches. How many people are on the train?
  10. 10.A train has 188 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  11. 11.635 − 557 =
  12. 12.363 − 158 =
  13. 13.216 − ? = 62
  14. 14.A school has 753 children. 481 of them are girls. How many boys are there?
  15. 15.A school has 755 children. 275 of them are girls. How many boys are there?
  16. 16.341 − ? = 122
  17. 17.? − 189 = 42
  18. 18.322 − ? = 222
  19. 19.487 + ? = 943
  20. 20.564 + ? = 954
  21. 21.A school has 952 children. 917 of them are girls. How many boys are there?
  22. 22.384 + 159 =
  23. 23.A school has 952 children. 791 of them are girls. How many boys are there?
  24. 24.A school has 681 children. 274 of them are girls. How many boys are there?
  25. 25.? − 208 = 36
  26. 26.? − 147 = 339
  27. 27.529 + 283 =
  28. 28.461 + 187 =
  29. 29.278 + 653 =
  30. 30.644 − ? = 367
  31. 31.466 − 421 =
  32. 32.? − 317 = 25
  33. 33.A school has 325 children. 178 of them are girls. How many boys are there?
  34. 34.? − 353 = 490
  35. 35.719 − 295 =
  36. 36.A train has 265 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  37. 37.? + 705 = 912
  38. 38.522 − 172 =
  39. 39.200 + ? = 430
  40. 40.357 − 350 =

Answer key

  1. 945
  2. 234
  3. 150
  4. 112
  5. 107
  6. 296
  7. 31
  8. 307
  9. 677
  10. 581
  11. 78
  12. 205
  13. 154
  14. 272
  15. 480
  16. 219
  17. 231
  18. 100
  19. 456
  20. 390
  21. 35
  22. 543
  23. 161
  24. 407
  25. 244
  26. 486
  27. 812
  28. 648
  29. 931
  30. 277
  31. 45
  32. 342
  33. 147
  34. 843
  35. 424
  36. 418
  37. 207
  38. 350
  39. 230
  40. 7

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