1. Let students experience the discovery process of rectangular and square area formulas.

2. Let students master the area formulas of rectangles and squares, which can solve some simple practical problems.

3. Understand the necessity of area conversion and the conversion relationship between area units in combination with the specific situation of solving the problem.

1. enables students to solve some simple problems in real life by using the area formulas of rectangles and squares.

2. Be able to carry out simple area conversion and solve some simple practical problems. In the process of solving problems, master the problem-solving strategies and realize that area conversion is a necessary means to solve problems.