SIKORE can help everyone to improve his mental arithmetic skills. You can easily generate free sheets with arithmetic problems for printing. The difficulty is freely configurable.
Difficulty:
Advanced: Pick one of the above, preconfigured difficulties or click here to show further options for configuration.
Sheet: Generate sheet Generate one sheet with problems and one with results for printing. The sheets open in two new tabs. Attention: Deactivate the popup-blocker.
SIKORE Live: Calculate now Create one chain and solve it online now.

News

9.12.11: Some Christmas News:
  • SIKORE live is now integrated into the main page.
  • The last settings are now remembered until your next visit.
  • SIKORE is now also reachable under www.sikore.org.
  • One more thing. Find out on your own.

How it works

  • Every chain with problems spans several lines. At the end of a line the intermediate result is copied to the beginning of the next line and used for the further calculations.
  • There are five chains on a sheet, e.g. one for every day of the (school-)week.
  • Use it in many ways: homework, exercise at school, with time limit, hall of fames, ...

Miscellaneous

SIKORE is my hobby. You may use it free of charge. A downloadable version (just for usage on computers without internet access) is available on request. Feedback is always welcome (just write to mich). Donations are welcome, too. Via PayPal:
  By the way, the word SIKORE is an abbreviation of Sicher Kopfrechnen which means reliable mental arithmetic.

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OP ARG
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