Entertaining tasks. Manual for primary school teachers (1948)
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Calculate how long will the charge go from the ground fly to the moon? And to the sun? Can you add all the numbers from 1 to 100 without a calculator? Make a square from a rectangle? Calculate how many ends 5 and a half sticks have? The presented book contains these and many other mathematical issues that will be useful to both school teachers and parents who help their children deal with tasks for the account and logic. All tasks in the book are divided into topics - into ingenuity, different account systems, to think and guess numbers, etc. - and are accompanied by explanations and illustrations, and at the end answers are given with detailed decisions
Author:
Author:Pole Grigory Borisovich
Cover:
Cover:Hard
Category:
- Category:Arts & Photography
ISBN:
ISBN:978-5-907435-11-7
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