Variables & expressions
9 videos
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Pre-algebra - What Are Variables and Expressions?
Learn what variables and expressions are in algebra using a pizza example. See how changing variables affect expression results and prepare for terms, factors, and coefficients.
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Pre-algebra - Terms, Factors, and Coefficients
Learn to identify terms, factors, and coefficients in algebra expressions. Understand how expressions are built from smaller pieces that get added, subtracted, or multiplied.
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Pre-algebra - Evaluating Expressions (One Variable)
Learn how to evaluate algebraic expressions by substituting variables with numbers and following order of operations to solve real-world problems like calculating pay.
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Pre-algebra - Evaluating Expressions with Two Variables
Learn how to evaluate algebraic expressions with two variables by substituting values and following order of operations. Includes a step-by-step example and common mistakes.
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Pre-algebra - How Expressions Change as Variables Change
Learn how expressions change as variables increase or decrease, using subtraction and division examples with real-world analogies like spending money and splitting pizza.
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Pre-algebra - Writing Algebraic Expressions from Words
Learn how to translate English phrases into algebraic expressions by recognizing key words that represent mathematical operations like addition, subtraction, multiplication, and division.
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Pre-algebra - The Distributive Property
Learn the distributive property in algebra: how to multiply across addition and factor expressions. Includes real-world examples and practice with variables.
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Pre-algebra - Combining Like Terms
Learn how to combine like terms in algebra by grouping terms with the same variable and adding or subtracting their coefficients to simplify expressions.
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Pre-algebra - Finding Equivalent Expressions
Learn how to determine if two algebraic expressions are equivalent by distributing, combining like terms, and verifying with substitution.