The science that studies the spatial form and quantitative relationship of the real world, including arithmetic, algebra, geometry, trigonometry, calculus and so on.
In other words, if you study mathematics, you will have a rigorous system in your mind-spatial form and quantitative relationship.
In this way, you will think about the matter itself and give it a quantitative indicator.
This is very helpful for you to analyze things, compare things and predict the changes of things.
Just like physics, it is a subject that studies the theory of action. On the surface, it has nothing to do with mathematics, but in fact, without mathematics, physics is like a fish out of water.
Only by expressing physics with mathematical expressions can people really understand physics.
So mathematics plays a tool role in your logical thinking, that is, it is a quantitative index that helps to know and understand things.