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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 302 · 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 614 children. 521 of them are girls. How many boys are there?
  2. 2.577 − 157 =
  3. 3.A school has 599 children. 398 of them are girls. How many boys are there?
  4. 4.A train has 658 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  5. 5.? − 259 = 488
  6. 6.677 − 158 =
  7. 7.A school has 947 children. 592 of them are girls. How many boys are there?
  8. 8.? − 321 = 503
  9. 9.A school has 842 children. 172 of them are girls. How many boys are there?
  10. 10.527 − 456 =
  11. 11.327 − 158 =
  12. 12.A train has 455 people in the front coaches and 299 people in the back coaches. How many people are on the train?
  13. 13.? − 211 = 1
  14. 14.A school has 493 children. 127 of them are girls. How many boys are there?
  15. 15.954 − 828 =
  16. 16.? − 705 = 168
  17. 17.A school has 977 children. 900 of them are girls. How many boys are there?
  18. 18.890 − 711 =
  19. 19.A school has 350 children. 146 of them are girls. How many boys are there?
  20. 20.A school has 825 children. 340 of them are girls. How many boys are there?
  21. 21.? + 473 = 709
  22. 22.225 − ? = 110
  23. 23.A school has 900 children. 551 of them are girls. How many boys are there?
  24. 24.? − 366 = 151
  25. 25.838 − 704 =
  26. 26.A school has 952 children. 882 of them are girls. How many boys are there?
  27. 27.? + 857 = 985
  28. 28.738 − 315 =
  29. 29.A school has 270 children. 188 of them are girls. How many boys are there?
  30. 30.A school has 545 children. 348 of them are girls. How many boys are there?
  31. 31.254 + 602 =
  32. 32.A school has 485 children. 469 of them are girls. How many boys are there?
  33. 33.A school has 240 children. 190 of them are girls. How many boys are there?
  34. 34.A train has 229 people in the front coaches and 457 people in the back coaches. How many people are on the train?
  35. 35.A train has 826 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  36. 36.A train has 414 people in the front coaches and 427 people in the back coaches. How many people are on the train?
  37. 37.920 − 739 =
  38. 38.222 + 721 =
  39. 39.352 + 404 =
  40. 40.330 − 141 =

Answer key

  1. 93
  2. 420
  3. 201
  4. 937
  5. 747
  6. 519
  7. 355
  8. 824
  9. 670
  10. 71
  11. 169
  12. 754
  13. 212
  14. 366
  15. 126
  16. 873
  17. 77
  18. 179
  19. 204
  20. 485
  21. 236
  22. 115
  23. 349
  24. 517
  25. 134
  26. 70
  27. 128
  28. 423
  29. 82
  30. 197
  31. 856
  32. 16
  33. 50
  34. 686
  35. 938
  36. 841
  37. 181
  38. 943
  39. 756
  40. 189

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