Abacus - Calculating on the lines
Abacus - Calculating on the linesCalculating on lines was in wide use in the Middle Ages. Adam Ries already described that vivid arithmetic technique....
Timo Hohlweck
1 頁 1 / 1
Abacus - Calculating on the linesCalculating on lines was in wide use in the Middle Ages. Adam Ries already described that vivid arithmetic technique....