Learn how mathematicians write ideas as expressions — including exponents, variables, and equivalent forms.
Each topic is a short page: read the walkthrough, watch the video, try the practice, then take a quick quiz. Go in order or jump to what you need.
Powers mean repeated multiplication — and PEMDAS sets the order.
Turn word phrases into math, then plug in numbers to evaluate.
Spread the number outside the parentheses, then combine matching terms.
By the end of this unit, you should be able to:
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