Unlike the picture, there are no decimals. The rightmost column is the unit column.
Hi, the abacus is Chinese invention, not japanese !!!
i never made any claim to who invented the abacus. i'm just clarifying that this problem pertains to the japanese soroban, which is specifically designed for base-10 arithmetic.
Link provided to webhome.idirect.com appears to be down. Here is another link:
i dont get it..how does it work?
Triangle Numbers Below N
Bottles of beer
What number has this problem?
Parse me a Lisp
First N Perfect Squares
Next Higher Power of B
Test if a Number is a Palindrome without using any String Operations
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