Teaching aid scenario demonstration, introducing questions. Use four kinds of fruit teaching AIDS to guide students to explore and compare the number of objects. For example, in the picture below, there are 5 oranges and 3 tomatoes. There are more oranges than tomatoes. Then guide the students to compare the sizes of numbers. 5 is greater than 3. By analogy, let students establish the concepts of "greater than", "less than" and "equal to" and a sense of mathematical cognition.

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From teaching aid demonstration to concrete mathematical symbols. From perceptual knowledge to rational knowledge, let students learn to express the number of objects in mathematical language. Teach students to know the three symbols of ratio: greater than sign ">" and less than sign "

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Understand and master the meaning of the equal sign "=" and apply it in practice. Starting from the case of life equality, this paper introduces students' understanding of the equal sign "=", and probes into the practical significance of the equal sign "=". And use mathematical language to express the meaning of the equal sign "=". For example, the number of rabbits is equal to carrots, and 4=4.

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Know and master the meaning of greater than sign ">", and apply it in practice. Judging from the number of cases in life,

Introduce the understanding of greater than sign ">" to students, and explore the significance of greater than sign ">" in reality. And use mathematical language to express the meaning of greater than sign ">". For example, the number of needles on the left is more than that on the right, that is, 6 >; 4。

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Know and master the greater than sign "

Introduce the greater than sign to students. "

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Contact and develop training. The three symbols of the ratio size are greater than the symbol ">" and less than the number "

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