1. Pre-Algebra Chapter 1
Name Period

2. Section 1-1 Variables and Expressions
Pre-Algebra Chapter 1
Section 1-1
Variables and Expressions

4. Algebraic Expressions and Integers Variables and. Expressions
Algebraic Expressions and Integers Variables and Expressions Identifying Writing

5. Vocabulary
Definition
Example
Numeric Expression
An expression with only numbers
4 + 6
5 × 8 - 2
Variable
A letter that represents an unknown number
A, f, or p
Variable Expression
An expression with at least one variable
4 + x, ab or 5n – 2

6. Operation Words
Add: total, more than, more, increased by, sum, and, combined, together
Subtract: difference, fewer than, less than, less, decreased by, left, minus
Multiply: product, times, per for each, multiply
Divide: quotient, divided by, per, for each, divide

7. Steps for Writing a Variable Expression
Identify the unknown or the variable.
Determine the operation.
Rewrite the expression using mathematical symbols.
d dozen eggs
dozen = 12
1 dozen = 1 × 12, 2 dozen = 2 × 12
d × 12 or 12d