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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 785 · 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 963 children. 554 of them are girls. How many boys are there?
  2. 2.A school has 406 children. 135 of them are girls. How many boys are there?
  3. 3.? + 341 = 491
  4. 4.379 − 324 =
  5. 5.A school has 319 children. 214 of them are girls. How many boys are there?
  6. 6.A school has 892 children. 475 of them are girls. How many boys are there?
  7. 7.A train has 267 people in the front coaches and 241 people in the back coaches. How many people are on the train?
  8. 8.617 − 287 =
  9. 9.932 − ? = 207
  10. 10.? − 512 = 460
  11. 11.A school has 207 children. 133 of them are girls. How many boys are there?
  12. 12.A school has 597 children. 270 of them are girls. How many boys are there?
  13. 13.A train has 524 people in the front coaches and 352 people in the back coaches. How many people are on the train?
  14. 14.A school has 841 children. 217 of them are girls. How many boys are there?
  15. 15.696 + 255 =
  16. 16.A school has 267 children. 147 of them are girls. How many boys are there?
  17. 17.A train has 176 people in the front coaches and 784 people in the back coaches. How many people are on the train?
  18. 18.A school has 313 children. 102 of them are girls. How many boys are there?
  19. 19.A train has 441 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  20. 20.A train has 601 people in the front coaches and 362 people in the back coaches. How many people are on the train?
  21. 21.840 + 120 =
  22. 22.222 + 321 =
  23. 23.711 + ? = 962
  24. 24.761 − ? = 641
  25. 25.A train has 367 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  26. 26.531 − 319 =
  27. 27.A school has 343 children. 326 of them are girls. How many boys are there?
  28. 28.A train has 801 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  29. 29.634 − 314 =
  30. 30.284 − ? = 146
  31. 31.A school has 520 children. 286 of them are girls. How many boys are there?
  32. 32.901 − ? = 691
  33. 33.A school has 256 children. 160 of them are girls. How many boys are there?
  34. 34.169 + 760 =
  35. 35.? − 140 = 222
  36. 36.985 − 907 =
  37. 37.413 + 256 =
  38. 38.823 + 172 =
  39. 39.A school has 627 children. 203 of them are girls. How many boys are there?
  40. 40.A train has 632 people in the front coaches and 310 people in the back coaches. How many people are on the train?

Answer key

  1. 409
  2. 271
  3. 150
  4. 55
  5. 105
  6. 417
  7. 508
  8. 330
  9. 725
  10. 972
  11. 74
  12. 327
  13. 876
  14. 624
  15. 951
  16. 120
  17. 960
  18. 211
  19. 643
  20. 963
  21. 960
  22. 543
  23. 251
  24. 120
  25. 607
  26. 212
  27. 17
  28. 910
  29. 320
  30. 138
  31. 234
  32. 210
  33. 96
  34. 929
  35. 362
  36. 78
  37. 669
  38. 995
  39. 424
  40. 942

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