What is the name of the second unit of mathematics in the first volume of the fifth grade?
There are several sets of textbooks used in primary schools across the country, such as: the second unit of the fifth-grade mathematics book 1 of People's Education Edition is called location, and the second unit of the fifth-grade mathematics book 1 of Jiangsu Education Edition is called polygon area. The questions raised are also very vague, which makes people unable to answer. In fact, his correct answer is not unique, so I will answer them like this!