1. preparation tools: prepare a blank sheet of paper, a pen, a calculator or a counter, etc.

2. Determine the theme: Determine the content to be recorded, such as a mathematical concept learned today, an interesting mathematical problem, and your own feelings in mathematics learning.

Sketch: Use simple figures and lines to express your ideas on white paper, such as drawing a bracket with "math diary" on it, or drawing a clock to indicate time.

4. Add details: On the basis of the sketch, add more details and elements, such as writing numbers or pointers on the clock, or drawing a simple figure or symbol next to the mathematical concept.

5. Finish painting: Finally, touch up with colored pens or other tools to make math diary more lively and interesting.

6. Inspection and improvement: Check whether there are any mistakes or deficiencies in the painting and make improvements.

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Precautions:

In the process of painting, we can try to express mathematical elements with different lines and shapes, such as straight lines, curves, circles, squares and so on. At the same time, you can also try to express different mathematical elements or concepts with different colors. You can play according to your own preferences and creativity, while paying attention to the cleanliness and clarity of the picture.

Knowledge expansion:

Multiplication is a shortcut to add up 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. The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is a systematic summary of this basic definition.

Multiplication can also be seen as calculating the objects arranged in a rectangle (integer) 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.