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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 27 · 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.? − 245 = 146
  2. 2.A school has 847 children. 693 of them are girls. How many boys are there?
  3. 3.A train has 888 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  4. 4.855 − 185 =
  5. 5.? − 306 = 104
  6. 6.369 − 154 =
  7. 7.? + 601 = 827
  8. 8.A train has 519 people in the front coaches and 405 people in the back coaches. How many people are on the train?
  9. 9.A train has 110 people in the front coaches and 863 people in the back coaches. How many people are on the train?
  10. 10.419 + 367 =
  11. 11.400 + 485 =
  12. 12.627 − 108 =
  13. 13.A school has 280 children. 134 of them are girls. How many boys are there?
  14. 14.A train has 632 people in the front coaches and 289 people in the back coaches. How many people are on the train?
  15. 15.? − 186 = 321
  16. 16.739 − 262 =
  17. 17.A train has 309 people in the front coaches and 252 people in the back coaches. How many people are on the train?
  18. 18.? + 572 = 929
  19. 19.132 + ? = 960
  20. 20.A train has 821 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  21. 21.156 + 255 =
  22. 22.646 + ? = 951
  23. 23.? − 273 = 251
  24. 24.A school has 673 children. 412 of them are girls. How many boys are there?
  25. 25.A train has 310 people in the front coaches and 677 people in the back coaches. How many people are on the train?
  26. 26.262 + 280 =
  27. 27.211 − 167 =
  28. 28.A train has 864 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  29. 29.? + 274 = 866
  30. 30.A school has 360 children. 324 of them are girls. How many boys are there?
  31. 31.A school has 431 children. 400 of them are girls. How many boys are there?
  32. 32.A school has 376 children. 253 of them are girls. How many boys are there?
  33. 33.759 + ? = 882
  34. 34.587 − ? = 195
  35. 35.289 + 153 =
  36. 36.652 + 298 =
  37. 37.A train has 497 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  38. 38.346 − 182 =
  39. 39.? + 547 = 963
  40. 40.475 − 150 =

Answer key

  1. 391
  2. 154
  3. 992
  4. 670
  5. 410
  6. 215
  7. 226
  8. 924
  9. 973
  10. 786
  11. 885
  12. 519
  13. 146
  14. 921
  15. 507
  16. 477
  17. 561
  18. 357
  19. 828
  20. 938
  21. 411
  22. 305
  23. 524
  24. 261
  25. 987
  26. 542
  27. 44
  28. 990
  29. 592
  30. 36
  31. 31
  32. 123
  33. 123
  34. 392
  35. 442
  36. 950
  37. 821
  38. 164
  39. 416
  40. 325

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