The earliest form a calculator, the abacus originated between 2700 to 2300 BC... Always a brilliant way to teach counting, numbers, addition, subtraction, etc, this abacus appears to have been made in China... Width 14.5" Height 6" Depth 1"
The earliest form a calculator, the abacus originated between 2700 to 2300 BC... Always a brilliant way to teach counting, numbers, addition, subtraction, etc, this abacus appears to have been made in China... Width 14.5" Height 6" Depth 1"