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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 517 · 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. 1.530 − 462 =
  2. 2.A school has 488 children. 290 of them are girls. How many boys are there?
  3. 3.554 − ? = 179
  4. 4.272 − ? = 117
  5. 5.A train has 110 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  6. 6.? − 106 = 149
  7. 7.198 + 688 =
  8. 8.A school has 250 children. 202 of them are girls. How many boys are there?
  9. 9.468 − 132 =
  10. 10.634 + ? = 788
  11. 11.346 + ? = 975
  12. 12.A school has 384 children. 364 of them are girls. How many boys are there?
  13. 13.594 − ? = 346
  14. 14.A school has 700 children. 138 of them are girls. How many boys are there?
  15. 15.A school has 415 children. 180 of them are girls. How many boys are there?
  16. 16.533 − 527 =
  17. 17.331 + 410 =
  18. 18.? + 439 = 650
  19. 19.205 − 182 =
  20. 20.892 + 107 =
  21. 21.? + 275 = 796
  22. 22.509 − 202 =
  23. 23.A school has 218 children. 142 of them are girls. How many boys are there?
  24. 24.382 + 157 =
  25. 25.? − 100 = 670
  26. 26.A train has 851 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  27. 27.A train has 163 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  28. 28.218 − 112 =
  29. 29.382 − 220 =
  30. 30.417 + 262 =
  31. 31.531 − 280 =
  32. 32.591 − 374 =
  33. 33.A train has 326 people in the front coaches and 374 people in the back coaches. How many people are on the train?
  34. 34.A school has 618 children. 333 of them are girls. How many boys are there?
  35. 35.A school has 303 children. 209 of them are girls. How many boys are there?
  36. 36.A train has 242 people in the front coaches and 727 people in the back coaches. How many people are on the train?
  37. 37.145 + ? = 301
  38. 38.A school has 300 children. 278 of them are girls. How many boys are there?
  39. 39.A train has 549 people in the front coaches and 232 people in the back coaches. How many people are on the train?
  40. 40.201 − ? = 44

Answer key

  1. 68
  2. 198
  3. 375
  4. 155
  5. 395
  6. 255
  7. 886
  8. 48
  9. 336
  10. 154
  11. 629
  12. 20
  13. 248
  14. 562
  15. 235
  16. 6
  17. 741
  18. 211
  19. 23
  20. 999
  21. 521
  22. 307
  23. 76
  24. 539
  25. 770
  26. 980
  27. 398
  28. 106
  29. 162
  30. 679
  31. 251
  32. 217
  33. 700
  34. 285
  35. 94
  36. 969
  37. 156
  38. 22
  39. 781
  40. 157

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