1. Draw a text box on white paper.

2. Write "Unit 4, Grade Two" in the text box.

3. Draw a second-level title on both sides, and then add the relevant content of "Unit 4, Grade Two" to the second-level title.

4. Add a few smaller branches to the branches, and add relevant content, and the mind map about Unit 4 of Grade Two will be ready.

The specific contents of Unit 4 of Mathematics in Grade Two of Primary School are as follows:

1, the meaning of multiplication Multiplication is a simple algorithm to calculate the sum of several identical addends. For example, if 2+2+2=6 is calculated, it will be 2×3=6 or 3×2=6.

2. How to write and read multiplication formula? When writing a multiplication formula, you can write the same addend first, then the multiplication symbol, then the number of the same addend, and finally the equal sign and the addition. You can also write the number of the same addend first, then write the multiplication symbol, then write the same addend, and finally write the sum of equal sign and continuous addition. When reading multiplication formulas, read them in the formula order.

3. The names and practical significance of each part in the multiplication formula. In the multiplication formula, the number before the multiplication symbol and the number after the multiplication symbol are called "multipliers", and the number after the equal sign is called "products".

The importance of multiplication

Multiplication is a simple representation of addition, which refers to a shortcut to add the same numbers. The result of its operation is called product, and "X" is the symbol of multiplication. From the philosophical point of view, multiplication is the result of qualitative change caused by additive quantity. In mathematics, multiplication is considered as calculating the objects arranged in a rectangle, or finding the area of a rectangle with a given side length.

The area of the rectangle does not depend on which side is measured first, which shows the exchange property. The product of two measured values is a new type of measurement, for example, multiplying the length of two sides of a rectangle to get its area, which is the theme of size analysis.