Finger Counting

指で数をあらわす　。。。二進法

毎日指数字を遊ぶとボケ防止になります。

片手で ３１ まで、両手を使えば １０２３ まで表すことができます。意外と思いませんでしたか?　「0」と「1」のニつの数字しか使わない分、ニ進法は桁数が直ぐに上がっていきますね。
しかし、そのことを逆手にとれば、10本の指で1023まで表すことができるという訳です。
ついでにニ進法の掛け算はどうなるのでしょうか？


Binary Finger Counting: 1 to 1023



The thumb represents the value 1, the index is double that, so it's 2, and the middle is double the index, so it's 4, etc. This is key to understanding and fluently counting in binary on your fingers.

Remember, a finger UP means 1, a finger DOWN means 0.

To make the number 3 for instance, you have to combine a 2 finger and a 1 finger (2+1=3).



To make the number 11 for instance, you have to combine an 8 finger, a 2 finger and a 1 finger (8+2+1=11).

To make the number 18 for instance, you have to combine a 16 and a 2 finger (16+2=18).

To make the number 23 for instance, you have to combine the 16 finger, the 4 finger, the 2 finger and the 1 finger (16+4+2+1=23).

To make the number 28 for instance, you have to combine the 16 finger, the 8 finger, and the 4 finger (16+8+4=28).



................................................................................................

So How Do We Get 1023?



Once you've used all 5 fingers on the right hand, start with the pinky of the left hand. The pinky would be double the pinky of the right hand, so it's value would be 32.

So to represent the number 449 on your fingers:




Copyright 1995 By: John Selvia
http://www.lyzrdstomp.com/binary/bin1-7.html

Finger Language, Body Language
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極楽庵
GokuRakuAn

だるま資料館
Daruma Museum, Japan

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