Equations, expressions, and inequalities
In this topic, we will look at 1- and 2-step equations, as well as expressions and inequalities.
This course contains 15 segments:
Intro to variables
Wait, why are we using letters in math? How can an 'x' represent a number? What number is it? This tutorial is great if you're just beginning to delve into the world of variables and expressions.
Substitution & evaluating expressions
Learn how to substitute (or "plug in") values for variables and evaluate algebraic expressions.
Expression value intuition
Explore how the value of an algebraic expression changes as the value of its variable changes.
Constructing numeric expressions
Let's construct and interpret expressions from word problems. We can also think about what the effects of parentheses are.
Evaluating expressions word problems
Learn how to plug in values to evaluate real-world expressions.
Writing algebraic expressions introduction
Learn the basics of writing expressions with variables.
Writing basic algebraic expressions word problems
Learn how to write algebraic expressions (expressions with variables) to model real-world situations.
Algebraic equations basics
Explore what it means for equations with variables (algebraic equations) to be solved.
One-step equations intuition
A high-level, conceptual walk-through of what an equation represents and why we do the same thing to both sides of it
One-step addition & subtraction equations
Solve equations by adding and subtracting numbers from both sides.
One-step multiplication and division equations
Solve equations by multiplying and dividing numbers from both sides.
One-step equation word problems
Let's use our algebra tools to solve a problem of earth-shattering importance: which Super Yoga plan is the best value! In this word problem, you'll put to practice your knowledge of variables, substitution, and one-step equations.
Inequalities: Greater than and less than basics
Equality is usually a good thing, but the world is not a perfect place. No matter how hard we try, we can't help but compare one thing to another and realize how unequal they may be. This tutorial gives you the tools to do these comparisons in the mathematical world (which we call inequalities). You'll become familiar with the "greater than" and "less than symbols" and learn to use them.
Two-step equations intro
Learn how to solve equations like 2x+7=13 and 3(x+4)=3, which can be solved in two steps.
Dependent and independent variables
Sometimes one variable depends on another. For example, the amount of money you make might depend on how many hours you work.
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Rating | Not enough ratings |
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Length | 15 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Pre-algebra |
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Rating | Not enough ratings |
---|---|
Length | 15 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Pre-algebra |
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