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What are the formulas and variants of the third unit of mathematics in the fifth grade of primary school?
The fifth grade of primary school mathematics Volume II

Unit 1, Graphic Transformation, No Formula

Unit 2, factor and multiple, no formula

Unit 1, cuboid and cube, formula:

Cube: surface area = side length × side length ×6

Volume = side length × side length × side length

Cuboid: surface area = (length× width+length× height+width× height) ×2.

Volume = length× width× height

Unit 4, the meaning and nature of the fraction, the formula of the nature:

B/A = (b× c)/(a× c) = (b÷ d)/(a÷d) (both c and d are not equal to 0).

Unit 5, Addition and subtraction of fractions, the formula is:

b/a+c/a=(b+c)/a

b/a-c/a=(b-c)/a

Unit 6, Statistics, Formula

Average value =(a 1+a2+a3++an)÷n