1 and 5-year-old children have a relatively strong cognitive ability and have a certain understanding of the concepts of logarithm and quantity.

2. The content of the first grade mathematics is relatively basic, including the understanding of numbers, addition and subtraction, simple multiplication and division, etc. These contents are very simple for five-year-old children.

It is not difficult for five-year-old children to learn first-grade mathematics. It is necessary for this child to be careful rather than careless.