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The Project Gutenberg EBook of 1001 tasks for mental calcul...The Project Gutenberg EBook of 1001 tasks for mental calculation by Sergej Aleksandrovich Rachinskij This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: 1001 tasks for mental calculation Author: Sergej Aleksandrovich Rachinskij Release Date: August 14, 2005 [EBook #16527] Language: Russian *** START OF THIS PROJECT GUTENBERG EBOOK 1001 TASKS FOR MENTAL CALCULATION *** - |
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