Main content

# Pre-algebra

Looking for Missions? Click here to start or continue working on the Pre-algebra Mission.

## We’ve made improvements to this course!

We’ve recently made improvements to Pre-algebra! We've added new exercises and videos to cover more subjects.

Learn moreFractions intro: Fractions Fractions on the number line: Fractions Equivalent fractions: Fractions Comparing fractions: Fractions Common denominators: Fractions Decomposing fractions: Fractions Adding and subtracting fractions with like denominators: Fractions Mixed numbers: Fractions Adding and subtracting fractions with unlike denominators: Fractions Adding and subtracting mixed number with unlike denominators: Fractions

Adding and subtracting fractions word problems: Fractions Multiplying whole numbers and fractions: Fractions Multiplication as scaling: Fractions Multiplying fractions: Fractions Multiplying mixed numbers: Fractions Multiplying fractions word problems: Fractions Fractions as division: Fractions Dividing unit fractions and whole numbers: Fractions Dividing fractions by fractions: Fractions Dividing fractions word problems: Fractions

Intro to negative numbers: Negative numbers and coordinate plane Order negative numbers: Negative numbers and coordinate plane Number opposites: Negative numbers and coordinate plane Absolute value: Negative numbers and coordinate plane

Intro to adding negative numbers: Negative numbers and coordinate plane Intro to subtracting negative numbers: Negative numbers and coordinate plane Adding & subtracting negative numbers: Negative numbers and coordinate plane Multiplying & dividing negative numbers: Negative numbers and coordinate plane Coordinate plane: Negative numbers and coordinate plane

Intro to ratios: Ratios, rates, proportionsVisualize ratios: Ratios, rates, proportionsRatio application: Ratios, rates, proportionsIntro to rates: Ratios, rates, proportionsIntro to percents: Ratios, rates, proportions

Percent, fraction, decimal conversions: Ratios, rates, proportionsPercent problems: Ratios, rates, proportionsPercent word problems: Ratios, rates, proportionsConstant of proportionality : Ratios, rates, proportionsIdentifying proportional relationships: Ratios, rates, proportionsWriting & solving proportions: Ratios, rates, proportions

Intro to variables: Equations, expressions, and inequalities Substitution & evaluating expressions: Equations, expressions, and inequalities Expression value intuition: Equations, expressions, and inequalities Constructing numeric expressions: Equations, expressions, and inequalities Evaluating expressions word problems: Equations, expressions, and inequalities Writing algebraic expressions introduction: Equations, expressions, and inequalities Writing basic algebraic expressions word problems: Equations, expressions, and inequalities

Algebraic equations basics: Equations, expressions, and inequalities One-step equations intuition: Equations, expressions, and inequalities One-step addition & subtraction equations: Equations, expressions, and inequalities One-step multiplication and division equations: Equations, expressions, and inequalities One-step equation word problems: Equations, expressions, and inequalities Inequalities: Greater than and less than basics: Equations, expressions, and inequalities Two-step equations intro: Equations, expressions, and inequalities Dependent and independent variables: Equations, expressions, and inequalities