Writing Addition and Subtraction Phrases as Expressions

Writing Addition and Subtraction Phrases as Expressions
Introduction

Translating word phrases into algebraic expressions is a key skill in algebra. Identifying keywords that signal addition or subtraction allows st...

Alex and Sam are planning a hike, but the headcount is not final. Alex says, “We need 10 more bottles than the number of hikers.”

Since the number of hikers can change, Sam decides to use a variable and write a mathematical expression.

Sam lets n represent the number of hikers. The bottles needed are 10 more than n, so he writes n +...