Hello! Five-year-olds should not begin to understand math and pinyin. There is a scientific basis for the compulsory education law to stipulate that students should enter school at the age of 6. Whether psychologically or physically, children should not be asked to do things beyond their power, otherwise they can only encourage others. "Kindergarten primary school" is a scientific practice. So don't worry. Mathematics helps children to initially perceive the concept of "number", know how to count, know "who is more than who, who is less than who", initially touch the addition and subtraction within 10, properly penetrate the understanding of clocks and watches in daily life, and initially understand RMB. In order to pave the way for the first grade of primary school, he can't be asked to "master" anything. As for pinyin, it is better not to teach it. First, the pronunciation and spelling methods are unacceptable to children. Second, learning a little knowledge in advance will affect the formal study of senior one.

I hope the above answers can help you.