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SIKORE can help everyone to improve his mental arithmetic skills. You can easily generate free sheets with arithmetic problems for printing. Or solve the problems online with your browser. The difficulty is freely configurable.

- 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, ...
- SIKORE is my hobby. You may use it free of charge.
- By the way, the word SIKORE is an abbreviation of
*Sicher Kopfrechnen*which means*reliable mental arithmetic*. - Support by PayPal:
*Send Money*to mich or right here:

www.sikore.org
© 2000-2024 Christian Schiffner
drawings Hannah Tischer

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Print your own sheets or calculate online on
http://www.sikore.org © 2000-2023

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Print your own sheets or calculate online on
http://www.sikore.org © 2000-2023

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