1. Is Teacher Zhang's perfect mathematical thinking effective? Teacher Zhang's perfect math thinking class in primary school can help exercise the brain and help children learn more. This is a good course, and Miss Li's math thinking class is also worth learning, but it is really expensive to watch the whole class at the original price, so Miss Li and Zhang choose Zhang as their perfect math.

2. Mathematics is a discipline that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.