Introduction - If you have any usage issues, please Google them yourself
Questions may be because of the reasons for the 10 fingers, so we have 0 ~ 9 to 10 the number of combinations of arbitrary numerical expression, but this is not the only possible notation. Living in a planet outside a biological wisdom, they hand in hand with our structure is different from the notation that they are very strange. Their mark with three' 0 ' ,' 1' ,'-' to express a combination of value, corresponding to the three marked values 0,1,-1.