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Pre-Algebra Chapter 1 Name Period

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**Section 1-1 Variables and Expressions**

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

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**Algebraic Expressions and Integers Variables and. Expressions**

Algebraic Expressions and Integers Variables and Expressions Identifying Writing

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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

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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

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**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

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