Here , you can see Al Khwarizmi. He is probably the greatest mathematician, in the Islamic world or even the whole world . He invented, algebra , arithmetic and he also created the numbers that most of us use, but also invented an islamic way of writing them. The way that he invented them is that each number must have angles, like number 1 has 1 angle and so on, but zero obviously has no angles. How this sort of mathematics is used today is, for example in schools we learn algebra , arithmetic and we use this in modern day life so that we can solve equations about the many things known to man. All of his achievements clearly make him recognizable as one of islam's greatest mathematicians.
Here. You can see the different numbers , of the islamic world and in total there are two sorts of numbering.