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建立人际资源圈The_Abacus
2013-11-13 来源: 类别: 更多范文
The Abacus
Have you ever wondered about where the mathematical machine, the abacus, came from, or what it is commonly used for' These are some questions that will be answered in my paper. My paper is generally about the abacuss beginning, its earlier forms, what it is used for today and in the past, how well it works, and how it has changed through the ages.
The abacus is perhaps the earliest computer ever known to man, after the ten fingers on you hands of course. The abacus was created because being limited to counting to ten, just wasnt enough. Some of the earliest versions of the abacus, are sometimes called are called Counting Boards . Counting boards were originally made of wood, metal, or stone. They often have ten, straight, parallel, rows horizontal with nine pebbles or marbles in each row. The abacus closely resembles that description, however it has stings or wire between the rows, and the pebbles is threaded on the sting.
The basics of using the counting board goes like this. There are nine pebbles in each row. The pebbles in all of the rows start out on
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