Pre-Algebra Chapter 1. Algebraic Expressions and Integers. Section 1-1 Variables and Expressions. is a letter or a symbol that replaces a number. Variable. Variable expression. is a mathematical phrase that uses variable, numbers and operation symbols. Numerical expression.
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Algebraic Expressions and Integers
is a letter or a symbol that replaces a number.
is a mathematical phrase that uses variable, numbers and operation symbols.
is a mathematical phrase that uses numbers and operation symbols.
Identify each expression as a numerical expression or a variable expression. For a variable expression, name the variable.
Remember order of operation by the following saying:
Please Excuse My Dear Aunt Sally
Simplify the following numerical expressions using the order of operations.
When adding opposites, the sum is zero
To add two integers with signs, find the difference of their absolute values. The sum has the sign of the integer with the greater absolute value.