Dot matrix multiplication is a simple multiplication calculation method, which is especially suitable for children to learn. The following is an illustration of the calculation method of dot matrix multiplication:

Let's draw a grid where two numbers are multiplied. The number of rows in this grid is the sum of the digits of two numbers, and the number of columns is the smaller of the two numbers. For example, if we want to calculate 32 times 28, then we will draw a grid with 5 rows and 3 columns each.

Align each bit of two numbers from left to right and from top to bottom, and write down their products in the table. For example, each number of 32 is multiplied by each number of 28, and the result is written in the corresponding grid. Add up all the figures in the table to get the final result. In this example, we add all the numbers to get 648.

This is the whole process of dot matrix multiplication. In this way, children can show each product by hand and better understand the process of multiplication. They can also find some interesting rules by observing the distribution of numbers in the grid.

Advantages of dot matrix multiplication:

1, easy to master: dot matrix multiplication simplifies complex multiplication operations into the form of tables, and children only need to calculate according to the tips in the tables. This easy-to-understand method enables children to get started easily and master the basic skills of multiplication quickly.

2. Enhance memory: Through dot matrix multiplication, let children practice multiplication repeatedly in actual operation, thus deepening their understanding and memory of multiplication. This kind of repeated practice is helpful to improve children's mathematical ability and calculation speed.

3. Wide application: dot matrix multiplication is not only suitable for children's learning, but also widely used in daily life and other fields. For example, lattice multiplication is widely used in business computing, statistics and other fields. By learning dot matrix multiplication, children can better adapt to the application needs in these fields.

4. Regularity: Grid multiplication has its inherent regularity. In each row and column, the distribution of numbers presents a certain law. Children can find these laws by observing the distribution of numbers in the grid, so as to better grasp the laws and characteristics of multiplication.