Correct mental arithmetic teaching method can improve children's mental development, brain development is good, learning mathematics can draw inferences, mathematical strength "will naturally improve".

The scope of mathematics is very wide, and the first thing children are exposed to is the +, -, ×, and ÷ of numbers. The +, -,  ×,  and ÷ of numbers are the focus of mental arithmetic teaching, and if the operation of numbers is assured, children will like mathematics more, like mathematics, and mathematical strength "will inevitably improve"