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Middle School Math
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Virtual Nerd tutorials in Middle School Math, organized by topic.
Middle School Math
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Number Sense and Algebraic Reasoning
Operations With Whole Numbers
How Do You Write a Whole Number Given in Standard Form in Expanded Form and in Words?
How Do You Multiply a Three-Digit Number by a One-Digit Number?
What is the Commutative Property of Multiplication?
What are the Identity Properties of Addition and Multiplication?
How Do You Write a Whole Number Given in Words in Standard Form and in Expanded Form?
How Do You Divide a Two-Digit Number by a One-Digit Number With No Remainder?
What is the Commutative Property of Addition?
How Do You Do Long Multiplication?
What's a Dividend and What's a Divisor?
How Do You Solve a Word Problem by Dividing Whole Numbers?
How Do You Add Whole Numbers?
How Do You Compare Two Whole Numbers?
How Do You Divide a Two-Digit Number by a One-Digit Number With a Remainder?
What is Multiplication?
How Do You Divide a Three-Digit Number by a One-Digit Number?
What is the Associative Property of Addition?
How Do You Subtract Whole Numbers?
How Do You Put Whole Numbers in Order From Least to Greatest?
What is the Associative Property of Multiplication?
How Do You Multiply a Two-Digit Number by a Two-Digit Number?
How Do You Figure Out What a Remainder Means When You're Dividing?
What is Division?
How Do You Divide Whole Numbers?
How Do You Find the Value of a Digit in a Whole Number?
How Do You Multiply a Two-Digit Number by a Two-Digit Number Using Partial Products?
What are Natural and Whole Numbers?
How Do You Put Whole Numbers in Order From Greatest to Least?
What is Place Value for Whole Numbers?
How Do You Estimate a Multiplication Problem by Rounding?
How Do You Multiply a Two-Digit Number by a One-Digit Number?
How Do You Do Long Division?
How Do You Write a Whole Number Given in Expanded Form in Standard Form and in Words?
Powers and Exponents
How Do You Convert a Number in Exponential Form into Expanded Form?
How Do You Convert a Number in Expanded Form into Exponential Form?
How Do You Evaluate an Exponent?
How Do You Use Powers to Solve a Word Problem?
What is an Exponent?
Order of Operations
What's the Order of Operations?
How Do You Simplify an Expression Using the Order of Operations with Exponents?
Which Operations Do You Do First in an Expression?
How Do You Simplify an Expression Using the Order of Operations?
Solving Equations With Mental Math
What are the Commutative Properties of Addition and Multiplication?
What are the Associative Properties of Addition and Multiplication?
How Do You Find a Value to Make an Open Sentence True?
What is an Open Sentence?
What are the Identity Properties of Addition and Multiplication?
Variables and Expressions
What Are Numerical and Algebraic Expressions?
What are Some Words You Can Use to Write Word Problems?
How Do You Evaluate an Algebraic Expression with One Variable?
What is a Variable?
How Do You Translate a Phrase with One Variable and Number Into a Mathematical Expression?
How Do You Translate Phrases into Numerical Expressions?
How Do You Complete a Table By Plugging in Values?
How Do You Write a Rule for a Table?
How Do You Evaluate an Algebraic Expression with Two Variables?
What is a Constant?
How Do You Determine Which Operations to Use in a Word Problem?
The Distributive Property
How Do You Use the Distributive Property to Rewrite and Solve an Addition Problem?
How Can You Distribute Numbers When You're Adding and Multiplying?
What is the Distributive Property?
How Do You Distribute a Number into an Addition Problem to Solve?
Sequences and Patterns
How Do You Find a Missing Term in a Sequence?
How Do You Write a Rule for a Pattern?
How Do You Find the Next Terms in an Arithmetic Sequence?
What's a Sequence?
How Do You Extend a Sequence by Multiplying?
A Problem-Solving Plan
How Do You Solve a Problem by Making a Table and Finding a Pattern?
How Do You Solve a Problem Using the Guess, Check, and Revise Method?
How Do You Solve a Problem by Making an Organized List?
How Do You Solve a Problem Using Logical Reasoning?
How Do You Solve a Word Problem Where You Multiply Fractions and Work Backwards?
How Do You Make a Problem Solving Plan?
How Do You Solve a Problem by Drawing a Diagram?
How Do You Use the Graph of a Linear Equation to Solve a Word Problem?
Measurement
The Customary System
How Do You Determine the Best Customary Units to Measure a Capacity?
What are the Customary Units of Weight?
What are the Customary Units of Capacity?
What are the Customary Units of Length?
How Do You Measure an Object in Inches Using a Ruler?
How Do You Determine the Best Customary Units to Measure a Weight?
Changing Customary Units
How Do You Convert Quarts to Gallons?
How Do You Convert Cups to Pints?
The Metric System
How Do You Measure an Object to the Nearest Centimeter Using a Ruler?
How Do You Determine the Best Metric Units to Measure a Mass?
How Do You Measure an Object in Millimeters Using a Ruler?
How Do You Determine the Best Metric Units to Measure a Capacity?
What are the Metric Units of Length?
What is Density?
What are the Metric Units of Capacity?
What are the Metric Units of Mass?
Changing Metric Units
How Do You Convert From Milliliters to Liters?
Decimals
Representing Decimals
What is Place Value?
What are Decimals?
How Do You Write a Fraction as a Decimal?
How Do You Write a Decimal as a Fraction?
Comparing and Ordering Decimals
How Do You Compare Two Decimals Using a Number Line?
Estimating With Decimals
How Do You Round a Decimal Using a Number Line?
How Do You Round a Decimal to a Given Place Value?
How Do You Estimate a Sum of Decimals by Clustering?
How Do You Use Front-End Estimation to Estimate a Sum of Several Decimals?
Adding and Subtracting Decimals
How Do You Regroup Numbers to Add Decimals Mentally?
What are Trailing Zeros?
How Do You Subtract Decimals?
How Do You Add Decimals?
Multiplying Decimals
How Do You Multiply a Decimal by a Whole Number Using Estimation to Place the Decimal?
How Do You Multiply a Decimal by a Whole Number?
How Do You Multiply Decimals?
Dividing Decimals
How Do You Do Long Division with Decimals?
How Do You Divide a Decimal by a Decimal?
How Do You Solve a Word Problem by Dividing with Decimals and Rounding Your Answer Up?
Multiplying and Dividing by Powers of Ten
What's Scientific Notation?
Solving Decimal Equations
How Do You Solve a Decimal Equation Using Addition?
How Do You Solve a Decimal Equation Using Division?
How Do You Solve a Decimal Equation Using Subtraction?
How Do You Solve a Decimal Equation Using Multiplication?
Number Theory and Fractions
Divisibility
How Do You Check if a Number is Divisible by 2, 3, 5, 6, and 10?
What Does Divisibility Mean?
Factors and Prime Factorization
How Do You Find All the Factors of a Number?
What is a Factor?
How Do You Write the Prime Factorization of a Number Using Exponents?
What's Another Definition for Prime and Composite Numbers?
How Do You Find the Prime Factorization of a Number Using a Tree?
What's a Prime Number?
Greatest Common Factor
How Do You Factor a Greatest Common Factor Out of an Algebraic Expression?
How Do You Find the Greatest Common Factor of Two Numbers Using Prime Factorization?
How Do You Find the Greatest Common Factor of Three Numbers?
How Do You Find the Greatest Common Factor of Two Numbers by Listing Their Factors?
What is a Greatest Common Factor?
Equivalent Fractions
What is Simplest Form of a Fraction?
How Do You Find a Missing Value to Make Two Fractions Equivalent?
What are Equivalent Fractions?
How Do You Write a Fraction in Simplest Form Using the GCF?
Least Common Multiple
How Do You Find the Least Common Multiple by Multiplying Common Factors?
What is a Multiple?
What is a Common Multiple and Least Common Multiple?
How Do You Find the Least Common Multiple by Listing Common Multiples?
Comparing and Ordering Fractions
How Do You Compare Fractions by Finding a Common Denominator?
How Do You Find a Common Denominator and a Least Common Denominator?
How Do You Put Fractions in Order Using an LCD?
Mixed Numbers and Improper Fractions
What's an Improper Fraction?
What's a Mixed Number?
How Do You Turn an Improper Fraction Into a Mixed Fraction?
How Do You Turn a Mixed Fraction Into an Improper Fraction?
Fractions and Decimals
How Do You Turn a Fraction Into a Terminating Decimal?
How Do You Turn a Fraction Into a Repeating Decimal?
How Do You Turn a Terminating Decimal Into a Fraction?
How Do You Order Fractions and Decimals From Greatest to Least?
What is a Repeating Decimal?
What is a Terminating Decimal?
Adding and Subtracting Fractions
Adding and Subtracting Fractions with Like Denominators
How Do You Add Two Fractions with the Same Denominator?
How Do You Add Three Fractions with the Same Denominator?
How Do You Subtract Two Fractions with the Same Denominator?
Adding and Subtracting Fractions with Unlike Denominators
How Do You Subtract Two Fractions with Different Denominators?
How Do You Add Two Fractions with Different Denominators?
How Do You Add Fractions with Different Denominators?
How Do You Find a Common Denominator and a Least Common Denominator?
Adding and Subtracting Mixed Numbers
How Do You Subtract Mixed Fractions with Different Denominators by Converting to Improper Fractions?
How Do You Add Mixed Fractions with the Same Denominator?
How Do You Add Mixed Fractions with Different Denominators by Converting to Improper Fractions?
How Do You Subtract Mixed Fractions with the Same Denominator?
How Do You Subtract Mixed Fractions with Different Denominators by Regrouping?
Solving Fraction Equations With Addition and Subtraction
How Do You Solve an Equation With Fractions With Different Denominators Using Subtraction?
How Do You Solve an Equation With Fractions With The Same Denominators Using Addition?
How Do You Solve an Equation With Fractions With The Same Denominators Using Subtraction?
How Do You Solve an Equation With Fractions With Different Denominators Using Addition?
Multiplying and Dividing Fractions
Multiplying Fractions
How Do You Multiply Fractions?
How Do You Multiply a Whole Number by a Fraction?
Multiplying Mixed Numbers
How Do You Multiply Mixed Numbers?
Dividing Fractions
What Does It Mean to Divide Fractions?
How Do You Divide Fractions?
What are Multiplicative Inverses?
What's a Reciprocal?
Dividing Mixed Numbers
How Do You Divide Mixed Numbers?
Solving Fraction Equations With Multiplication and Division
How Do You Solve an Equation Where You're Multiplying Fractions?
How Do You Solve a Word Problem Using an Equation Where You're Multiplying Fractions?
Ratios, Proportions, and Percent
Ratios and Rates
How Do You Convert a Rate To A Unit Rate?
How Do You Find Equivalent Ratios by Making a Table?
What are Equivalent Ratios?
How Do You Use a Table of Equivalent Ratios to Predict a Value?
How Do You Write Ratios From a Table?
What's a Ratio?
What are Rates and Unit Rates?
How Do You Write a Ratio From a Word Problem?
How Do You Write a Ratio in Simplest Form?
How Do You Find Equivalent Ratios?
How Do You Use Unit Rates to Compare Rates?
Proportions
What's the Means-Extremes Property of Proportions?
How Do You Solve a Proportion Using Cross Products?
What's a Proportion?
How Do You Solve a Word Problem Using a Proportion?
Scale Drawings and Models
How Do You Solve a Word Problem Using a Proportion?
How Do You Figure Out What Size a Model Should Be if You Have a Scale?
What is a Scale Drawing?
What is a Scale?
Percents
How Do You Figure Out a Percent From a Part to Part Ratio?
How Do You Turn a Percent into a Decimal?
How Do You Figure Out a Percent From a Part to Whole Ratio?
How Do You Turn a Percent Into a Fraction?
What's a Percent?
How Do You Turn a Decimal into a Percent?
How Do You Turn a Fraction Into a Percent?
Percents, Decimals, and Fractions
How Do You Put Fractions, Decimals, and Percents in Order?
How Do You Turn a Decimal into a Percent?
How Do You Turn a Fraction Into a Percent?
Percent of a Number
How Do You Use an Equation to Find a Percent of a Number?
How Do You Use a Proportion to Find a Percent of a Number?
What's a Percent Proportion?
Solving Percent Problems and Estimating With Percents
How Do You Estimate a Sale Price?
How Do You Estimate a Percent?
How Do You Use an Equation to Find a Whole?
How Do You Use a Proportion to Find What Percent a Part is of a Whole?
How Do You Use Mental Math to Estimate a Percent?
How Do You Find Percents Mentally Using Fractions?
How Do You Solve a Word Problem Using a Percent Proportion?
How Do You Set Up a Percent Proportion from a Word Problem?
How Do You Use Compatible Numbers to Estimate a Part of a Whole?
How Do You Use a Proportion to Find a Whole?
How Do You Figure Out a Tip?
Geometric Figures
Basics of Geometry
What is a Ray?
What is a Point?
What is a Line Segment?
What is a Plane?
What are Intersecting Lines?
What are the Endpoints of a Line Segment?
What are Perpendicular Lines?
What are Parallel Lines?
What are Skew Lines?
Angles
What is a Transversal?
What are Supplementary Angles?
How Do You Use Complementary Angles to Find a Missing Angle?
What are Vertical Angles?
What are Acute, Obtuse, Right, and Straight Angles?
How Do You Use Supplementary Angles to Find a Missing Angle?
What is a Degree?
What is an Angle?
What are Complementary Angles?
Classifying Polygons
What is a Trapezoid?
What is a Polygon?
What is a Rhombus?
What is a Rectangle?
What is a Square?
How Do You Classify Triangles?
What is a Triangle?
How Do You Classify Quadrilaterals?
How Do You Find a Missing Angle in a Triangle?
What are Equilateral, Isosceles, and Scalene Triangles?
What is the Triangle Sum Theorem?
What is a Quadrilateral?
What is a Parallelogram?
What are Acute, Obtuse, and Right Triangles?
What is a Regular Polygon?
Congruent and Similar Figures
What Does Congruent Mean?
What are Corresponding Parts in Similar Figures?
What are Similar Figures?
How do you Figure Out if Two Figures are Similar?
How Do You Identify Corresponding Parts in Congruent Triangles?
Line Symmetry
What is Rotational Symmetry?
Geometry and Measurement
Perimeter and Area of Rectangles
How Do You Find the Perimeter of a Rectangle?
What's the Formula for the Perimeter of a Rectangle?
How Do You Find the Area of a Rectangle?
What is the Formula for the Area of a Rectangle?
What is Area?
How Do You Find the Perimeter of a Shape?
Areas of Parallelograms, Triangles, and Trapezoids
What is the Formula for the Area of a Trapezoid?
What is the Formula for the Area of a Triangle?
How Do You Find the Area of a Composite Figure?
What is the Formula for the Area of a Parallelogram?
How Do You Find the Area of a Trapezoid?
How Do You Find the Area of a Triangle?
How Do You Find the Area of a Parallelogram?
Circumference and Area of Circles
How Do You Find the Area of a Circle if You Know the Radius?
How Do You Find the Circumference of a Circle if You Know the Radius?
What is the Formula for the Area of a Circle?
How Do You Find the Circumference of a Circle if You Know the Diameter?
What is a Circle?
What is Circumference?
What is Pi?
How Do You Find the Diameter of a Circle if You Know its Radius?
How Do You Find the Area of a Circle if You Know the Diameter?
Solid Figures
What is a Solid?
What is a Prism?
What is a Cylinder?
What is a Sphere?
What is a Pyramid?
What is a Cone?
Volume of Prisms and Cylinders
How Do You Find the Volume of a Rectangular Prism?
What is Volume?
What is the Formula for the Volume of a Prism?
What is the Formula for the Volume of a Rectangular Prism?
How Do You Find the Volume of a Triangular Prism?
Surface Area
How Do You Find the Surface Area of a Rectangular Prism Using a Net?
How Do You Find the Surface Area of a Cylinder Using a Net?
What is a Net?
Integers and the Coordinate Plane
Integers and Absolute Value
What Does Absolute Value Mean In the Real World?
What are Positive and Negative Numbers?
What is Absolute Value?
What is the Opposite, or Additive Inverse, of a Number?
What is the Number Line?
How Do You Find the Absolute Value of Positive and Negative Numbers?
What's an Integer?
How Do You Represent Real World Situations Using Integers?
Comparing and Ordering Integers
How Do You Compare Integers Using a Number Line?
How Do You Put Integers in Order Using a Number Line?
Adding Integers
How Do You Add Two Negative Numbers?
How Do You Add a Negative Number to a Positive Number?
How Do You Add Integers Using a Number Line?
What are the Rules for Using Absolute Values to Add Integers?
Subtracting Integers
How Do You Subtract a Negative Number from a Positive Number?
How Do You Subtract a Positive Number from a Negative Number?
How Do You Rewrite Subtraction as Addition?
How Do You Subtract Integers Using a Number Line?
Multiplying and Dividing Integers
How Do You Figure Out the Sign of a Product or Quotient?
How Do You Multiply and Divide Numbers with Different Signs?
What is Multiplication?
The Coordinate Plane
What is the Origin?
What is the X-Coordinate?
How Do You Graph Points in the Coordinate Plane?
What is the Y-Axis?
How Do You Find the Area of an Irregular Figure in the Coordinate Plane?
How Do You Graph Ordered Pairs in Each Quadrant?
How Do You Graph a Rectangle on a Coordinate Plane?
How Do You Find the Perimeter of a Rectangle in the Coordinate Plane?
What is the Coordinate Plane?
What is the Y-Coordinate?
What is an Ordered Pair?
How Do You Find the Area of a Rectangle in the Coordinate Plane?
How Do You Identify Points on a Graph?
What is the X-Axis?
What are Quadrants in the Coordinate Plane?
Transformations in the Coordinate Plane
How Do You Use a Graph to Reflect a Figure Over the X-Axis?
What is a Transformation?
How Do You Use a Graph to Translate a Figure Horizontally?
How Do You Use a Graph to Translate a Figure Vertically?
What is a Reflection?
What is a Translation?
What is an Image?
How Do You Use a Graph to Reflect a Figure Over the Y-Axis?
What is a Line of Reflection?
What is a Rotation?
Equations and Functions
Expressions and Equations
What is a Solution to an Equation?
What's a Coefficient?
What is an Equation?
How Do You Solve an Equation by Guessing and Checking?
What are Inverse Operations?
Solving Addition Equations
What's the Subtraction Property of Equality?
How Do You Solve a Word Problem with an Equation Using Subtraction?
How Do You Solve an Equation Using Subtraction?
Solving Subtraction Equations
What's the Addition Property of Equality?
How Do You Solve an Equation Using Addition?
How Do You Solve a Word Problem with an Equation Using Addition?
Solving Multiplication Equations
What's the Multiplication Property of Equality?
How Do You Solve a Word Problem with an Equation Using Division?
Solving Division Equations
What's the Division Property of Equality?
How Do You Solve an Equation Using Multiplication?
How Do You Solve a Word Problem with an Equation Using Multiplication?
Functions
What's a Function?
What's a Function?
Graphing Functions
What is Rate of Change?
What is a Linear Equation?
How Do You Check if a Point is on a Line If You Have an Equation?
How Do You Graph a Linear Equation by Making a Table?
How Do You Make a Table of Values for a Linear Equation?
What Does the Slope of a Line Mean?
Solving Two-Step Equations
How Do You Solve a Two-Step Equation?
Inequalities
What's an Inequality?
How Do You Graph an Inequality on a Number Line?
How Do You Graph the Intersection of Two Inequalities?
What's a Compound Inequality?
What Are Some Words We Use To Write Inequalities?
How Do You Write an Inequality from a Number Line Graph?
How Do You Solve a One-Step Inequality Using Subtraction?
How Do You Graph the Union of Two Inequalities?
Probability and Statistics
Probability
What is the Complement of an Event?
How Do You Find the Probability of a Simple Event?
How Do You Find the Probability of the Complement of an Event?
What is an Outcome?
What is Probability?
What is Experimental Probability?
Finding Outcomes
How Do You Determine All the Possible Outcomes of an Experiment?
What is a Permutation?
How Do You Use the Fundamental Counting Principle to Count the Number of Outcomes in a Sample Space?
How Do You Find a Number of Permutations Using the Fundamental Counting Principle?
What is the Fundamental Counting Principle?
What is a Sample Space?
How Do You Use a Tree Diagram to Count the Number of Outcomes in a Sample Space?
Probability of Independent Events and Areas
What are Compound Events?
How Do You Determine If Events are Independent or Dependent?
How Do You Find the Probability of Independent Events?
Samples and Sampling Methods
How Do You Use a Sample to Make Predictions About a Population?
What is an Unbiased Sample?
Graphs and Data Displays
How Do You Use a Line Graph to Make Predictions?
How Do You Use a Circle Graph to Make Predictions?
What is a Line Graph?
How Do You Interpret a Bar Graph With a Break in the Scale?
How Do You Interpret a Circle Graph?
What is a Double Bar Graph?
Frequency Tables and Line Plots
What is a Histogram?
How Do You Make a Frequency Table?
How Do You Make a Histogram?
What is a Line Plot?
What is a Frequency Table?
Mean, Median, Mode, and Range
How Do You Find the Mode of a Data Set?
How Do You Find the Mean of a Data Set?
What is the Mean of a Data Set?
What is the Median of a Data Set?
What is the Mode of a Data Set?
How Do You Find the Range of a Data Set?
How Do You Find the Median of a Data Set?
Stem-and-Leaf Plots
What is a Stem-And-Leaf Plot?
Measures of Variation
How Do You Compare Two Data Sets Using Box-and-Whisker Plots?
What is a Box-and-Whisker Plot?
How Do You Make a Box-and-Whisker Plot?
What is the Interquartile Range?
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