2.
A statement showing that two things are equal.
3.
A list of related facts from one calculation.
4.
When an operation can be in any order.
5.
An equation with a simple unknown like a, b, or x.
6.
Find a value that makes an equation true.
7.
A value you can substitute in place of the unknown in an equation to make it true.
8.
Terms whose variables are the same.
9.
Terms whose variables are not exactly the same.
10.
Two expression are equivalent if they always have the same value.
11.
Put like terms in an expression together as a single term.
12.
Rewrite in a simpler form, for example rewrite 8 x h as 8h.
