100 cells calculation practice
It can be inputted directly on Web. 
It can be calculated with the image which is close to the usual print.
An answer is done momentarily. 
If there is an error, it can start over even how many times. 
A record record is left by hope. It can register for time ranking by hope. It prepares for the number of cells 9 kinds in the space from 100 to 4. It can be chosen corresponding to the purpose because there are a normal course, a spiral course and two-digit course three courses. turn