Math: Properties of Numbers

Basically the laws of mathematics. 1-5

1. The Reflexive Property of Equality

A number is equal to itself.

Ex. 3 = 3

2. The Symmetric Property of Equality

If one value is equal to another, then the second value is the same as the first.

Ex. A = B is the same as B = A

3. The Transitive Property of Equality

If one value equals a second, and the second value equals a third, then the third is equal to the first.

Ex. If A = B and B = C then C = A

4. The Substitution Property.

If one value is equal to another, then the second can used in place of the first in any algebraic expression dealing with the first.

Ex. If: A = B and A + C = D then B + C = D too.

5. The Additive Property of Equality

We can add equal values to both sides of the equation without changing the validity of the equation.

Ex. A + 3 = B + 3 is the same as A +B.

They're quite simple. This is mainly for reference.

Sources: Youtube