Chisanbop

Chisanbop or chisenbop (from Korean chi (ji) finger + sanpŏp (sanbeop) calculation [1] 지산법/指算法), sometimes called Fingermath,[2] is a finger counting method used to perform basic mathematical operations.

[4] The system has been described as being easier to use than a physical abacus for students with visual impairments.

The hands can be held above a table, with the fingers pressing down on the table; or the hands can simply be held up, fingers extended, as with the more common practice of 0-10 counting.

A school in Shawnee Mission, Kansas, ran a pilot program with students in 1979.

Grace Burton of the University of North Carolina said, "It doesn't teach the basic number facts, only to count faster.

The Chisanbop system. When a finger is touching the table, it contributes its corresponding number to a total.
36 represented in chisanbop, where four fingers and a thumb are touching the table and the rest of the digits are raised. The three fingers on the left hand represent 10+10+10 = 30; the thumb and one finger on the right hand represent 5+1=6.
Counting from 1 to 20 in Chisanbop