Unit 3 · Overview
Expressions & Equations
Overview
Learn how mathematicians write ideas as expressions - including exponents, variables, and equivalent forms.
Topic 1 of 3~41 min
Your progress
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About this unit▾
How to work through it
- Write PEMDAS on a sticky note, use it on every exercise until it's automatic.
- Topic 2 (expressions) is vocabulary-heavy; make flashcards for terms like coefficient and term.
- Substitute numbers into expressions slowly; parentheses matter.
- Do Topic 3 (distributive property) exercises without skipping steps.
- Retake quizzes until you can score 100% on order of operations.
You should be able to
- •Evaluate numeric expressions using order of operations.
- •Write and interpret variable expressions from words.
- •Apply the distributive property to expand and simplify expressions.
- •Combine like terms in simple expressions.
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