What is the mathematical formula of the second volume of the fifth grade?

The mathematical formula of the second volume of grade five is as follows:

1, number of copies × number of copies = total number of copies/number of copies = total number of copies/number of copies = number of copies.

2. 1 multiple × multiple = multiple1multiple = multiple/multiple = 1 multiple.

3. Speed× time = distance ÷ speed = time ÷ distance ÷ time = speed.

4. Unit price × quantity = total price/unit price = total quantity/quantity = unit price.

5. Volume of cube = side length × side length × side length formula: V=aaa.

6. Sum of internal angles: sum of internal angles of triangle = 180 degrees.

7. Angle area = bottom × height ÷2.