# Foundations

## Negative numbers

Learn
Intro to negative numbersNumber oppositesNumber oppositesAdding numbers with different signsAdding & subtracting negative numbersSubtracting a negative = adding a positiveMultiplying positive & negative numbersWhy a negative times a negative is a positiveWhy a negative times a negative makes senseDividing positive and negative numbers
Practice
Negative numbers on the number lineGet 5 of 7 questions to level up!
Adding negative numbersGet 5 of 7 questions to level up!
Subtracting negative numbersGet 5 of 7 questions to level up!
Multiplying negative numbersGet 3 of 4 questions to level up!

## Absolute value

Learn
Absolute value examplesIntro to absolute valueAbsolute value and number linesInterpreting absolute value
Practice
Finding absolute valuesGet 5 of 7 questions to level up!
Interpreting absolute valueGet 3 of 4 questions to level up!

## Exponents

Learn
Intro to exponentsExponent example 1Exponent example 2Squaring numbersIntro to exponentsThe 0 & 1st powerPowers of zero1 and -1 to different powersComparing exponent expressionsExponents of decimalsEvaluating exponent expressions with variablesExponents review
Practice
Exponents (basic)Get 5 of 7 questions to level up!
ExponentsGet 5 of 7 questions to level up!
Variable expressions with exponentsGet 3 of 4 questions to level up!

## Square roots

Learn
Intro to square rootsSquare roots of perfect squaresSimplifying square rootsSimplifying square roots of fractionsSimplifying square-root expressions: no variables
Practice
Square rootsGet 5 of 7 questions to level up!
Simplify square rootsGet 3 of 4 questions to level up!
Simplify square roots (variables)Get 3 of 4 questions to level up!

## Order of operations

Learn
Intro to order of operationsOrder of operations examples: exponentsWorked example: Order of operations (PEMDAS)Order of operations example
Practice
Order of operationsGet 5 of 7 questions to level up!
Order of operations with negative numbersGet 5 of 7 questions to level up!

## Fractions

Learn
Adding fractions word problem: paintAdding fractions with different signsMultiplying positive and negative fractionsDividing negative fractions
Practice
Adding & subtracting negative fractionsGet 5 of 7 questions to level up!
Multiplying positive and negative fractionsGet 3 of 4 questions to level up!
Dividing positive and negative fractionsGet 3 of 4 questions to level up!

## Decimals, fractions and percentages

Learn
Worked example: Converting a fraction (7/8) to a decimal Fraction to decimal with roundingRewriting decimals as fractions: 0.36Converting decimals to fractions 2 (ex 1)Finding a percentPercent of a whole numberPercent word problem: guavasPercent word problem: recycling cans
Practice
Intro to percentsGet 5 of 7 questions to level up!
Percents from fraction modelsGet 3 of 4 questions to level up!
Relate fractions, decimals, and percentsGet 3 of 4 questions to level up!
Converting fractions to decimalsGet 3 of 4 questions to level up!
Write decimals as fractionsGet 5 of 7 questions to level up!
Finding percentsGet 5 of 7 questions to level up!
Percent word problemsGet 5 of 7 questions to level up!

## Operations with decimals

Learn
Adding decimals: 9.087+15.31Adding decimals: 0.822+5.65Subtracting decimals: 9.57-8.09Subtracting decimals: 39.1 - 0.794Multiplying decimals exampleMultiplying challenging decimalsDividing decimals with hundredthsDividing by a multi-digit decimal
Practice
Adding decimals: thousandthsGet 5 of 7 questions to level up!
Subtracting decimals: thousandthsGet 5 of 7 questions to level up!
Dividing decimals: hundredthsGet 3 of 4 questions to level up!

## Area of triangles

Learn
Area of a triangleArea of triangles
Practice
Area of trianglesGet 5 of 7 questions to level up!

## Circumference and area of circles

Learn
Radius, diameter, circumference & πLabeling parts of a circleRadius, diameter, & circumferenceArea of a circle
Practice
Radius and diameterGet 5 of 7 questions to level up!
Area of a circleGet 5 of 7 questions to level up!