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What are the good topics for the school-based curriculum of primary school mathematics?
Good topics are as follows:

1, mathematical inquiry and appreciation

2. Walking into Nature —— Case analysis and actual combat of biological innovation research

3. Bio-Olympics

4. Mathematical modeling

5. Math training.

6, high school chemistry comprehensive experiment

7, high school physics thinking method

8. China culture

9. Career exploration and planning

10, physical experiment method

arithmetic

Significance and counting method of four operations.

Addition meaning, subtraction meaning, multiplication meaning, division meaning, addition, subtraction, division, multiplication and check calculation.

Algorithms and simple methods, elementary arithmetic.

Additive commutative law (a+b=b+a), additive associative law (a+(b+c)=(a+b)+c), multiplicative commutative law (a*b=b*a), multiplicative associative law (a*(b*c)=(a*b)*c).

Multiplication distribution law (a*(b+c)=a*b+a*c), continuous reduction property (a-b-c=a-(b+c)) and quotient invariance property A ÷ b = (a× c) ÷ (b× c) = (a ÷.