What are the formulas in the first volume of sixth grade mathematics?

The formula of the first volume of sixth grade mathematics is as follows:

1, multiplication and distribution law: a(b+c)=ab+ac.

2, factor × factor = product; Product-one factor = another factor.

3. The circumference of a semicircle = half of the circumference+diameter =2( 1)×2πr=πr+dw.

4. Rectangular circumference = (length+width) ×2 C=(a+b)×2.

5. The surface area of a cuboid = (length× width+length× height+width× height )× 2s = 2 (AB+AH+BH).