8DefinitionThe order in which you perform operations can affect the value of an expression. To avoid confusion, mathematicians have agreed on an order of operations. Multiply and divide first. Then add and subtract.
9DefinitionTo simplify a numerical expression, you use the order of operations and replace the expression with the simplest name for its value.
10Key Concepts Order of Operations Work inside Grouping symbols. Multiply and Divide in order from left to right.Add and subtract in order from left to right.