1. Writing Expressions and Equations

2. Key Vocabulary Expression – a math sentence without equal signs
Equation – a math sentence with equal signs
Variable – a letter that is used to represent a number
Terms – the part of an expression that is being added together

3. Key Vocabulary
Coefficient – the number part of the term that has a variable with it
Constant Term – a term that has a number but no variable
Like Terms – terms that have identical variables
Inverse Operation – the opposite operation used to solve an equation

4. Expressions vs Equations
Expressions – written as phrases
Example – the sum of six and a number
x + 6
Equations – written as sentences
Example – the sum of six and a number IS ten
x + 6 = 10

5. A-HA Words Add Subtract Multiply Divide Plus Minus Times Divided by
The sum of
The difference of
The product of
The quotient of
Increased by
Decreased by of

6. Translating Verbal Phrases
A number increased by 5
7 less than a number
3 more than twice a number
4 decreased by the quotient of a number and 7

7. Translating Verbal Sentences
16 increased by a number is 27
The difference of twice a number and 3 equals -4
The product of ½ and a number is 36
-3 is equal to twice the sum of a number and 2