| A | B |
|---|
| variable | symbols, usually letters, used to stand for numbers |
| expression | mathematical statement that involves at least one operation sign |
| substitution | replacing a variable with a number |
| natural numbers | 1,2,3,4,... |
| whole numbers | 0,1,2,3,4 |
| order of operations | PEMDAS |
| commutative property of addition | a + b = b + a |
| identity property of addition | a + 0 = a |
| exponent | number used to tell how many times base is to be used as a factor |
| base | number being taken to a power |
| associative property of addition | (a + b) + c = a + (b + c) |
| distributive property | a(b + c) = ab + ac |
| factoring | opposite of distributing - taking out the GCF |
| like term | terms with variable factors exactly the same |
| true equation | equation with both sides equal |
| false equation | equation in which both sides are not equal |
| open equation | equation with at least one variable |
| formula | equation that shows a relationship between two variables |
| numerical expression | expression involving only numbers |
| algebraic expression | expression that involves at least one variable |
