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All Courses
Pre-Algebra
All Lessons
1
Level 1
0/4
Subtracting a Positive Number From a Smaller Positive Number
+15 XP
Subtracting a Positive Number From a Negative Number
+15 XP
Subtracting a Positive Fraction from a Negative Fraction
+15 XP
Subtracting a Positive Decimal From a Smaller Decimal
+15 XP
2
Level 2
0/4
Adding a Positive Number to a Negative Number
+15 XP
Adding a Negative Number
+15 XP
Subtracting a Negative Number
+15 XP
Additive Inverses
+15 XP
3
Level 3
0/4
Real-World Addition and Subtraction
+15 XP
Multiplying Positive Numbers With Negative Numbers
+15 XP
Multiplying Negative Numbers
+15 XP
Dividing With Negative Numbers
+15 XP
4
Level 4
0/4
Equivalent Fractions With Negative Numbers
+15 XP
Dividing With Negative Decimals and Fractions
+15 XP
Reciprocals of Rational Numbers
+15 XP
Multiplying and Dividing With Zero
+15 XP
5
Level 5
0/4
Fraction of Fractions
+15 XP
Divide Fractions by Fractions With Negatives
+15 XP
Divisibility of Integers by 2, 5, 10, 4, and 8
+15 XP
Divisibility of Integers by 3, 9, 6, and 7
+15 XP
6
Level 6
0/4
Natural Numbers, Integers, and Rational Numbers
+15 XP
Prime and Composite Numbers
+15 XP
Prime Factors
+15 XP
Finding Greatest Common Factors Using Prime Factorization
+15 XP
7
Level 7
0/4
Finding Lowest Common Multiples Using Prime Factorization
+15 XP
Prime Factorization
+15 XP
Squaring Rational Numbers
+15 XP
Cubing Rational Numbers
+15 XP
8
Level 8
0/4
Exponents with Rational Bases
+15 XP
The Zeroth Power
+15 XP
Powers of Negative One
+15 XP
Negative Exponents
+15 XP
9
Level 9
0/4
The Product Rule for Exponents
+15 XP
The Quotient Rule for Exponents
+15 XP
The Power of Product Rule for Exponents
+15 XP
The Power of Quotient Rule for Exponents
+15 XP
10
Level 10
0/4
Combining the Rules of Exponents
+15 XP
Writing Numbers in Scientific Notation
+15 XP
Converting Scientific Notation to Standard Notation
+15 XP
Comparing Numbers in Scientific Notation
+15 XP
11
Level 11
0/4
Adding and Subtracting in Scientific Notation
+15 XP
Addition in Scientific Notation With Different Powers of Ten
+15 XP
Subtraction in Scientific Notation With Different Powers of Ten
+15 XP
Further Addition in Scientific Notation With Word Problems
+15 XP
12
Level 12
0/4
Dividing Numbers in Scientific Notation
+15 XP
Evaluating Rational Number Expressions
+15 XP
Evaluating Expressions With Positive Integer Exponents
+15 XP
Evaluating Expressions With Integer Exponents
+15 XP
13
Level 13
0/4
The Square Root of a Number
+15 XP
Squaring a Square Root
+15 XP
The Cube Root of a Perfect Cube
+15 XP
Simplifying Expressions With Surds
+15 XP
14
Level 14
0/4
Evaluating Radical Expressions
+15 XP
Adding and Subtracting Radicals
+15 XP
Rationalizing Denominators
+15 XP
Square Roots
+15 XP
15
Level 15
0/4
Radicals as Fractional Exponents
+15 XP
The Product Rule for Radicals
+15 XP
The Quotient Rule for Radicals
+15 XP
Introduction to Ratios
+15 XP
16
Level 16
0/4
Equivalent Ratios
+15 XP
Writing Ratios Using Fractions
+15 XP
Reasoning With Equivalent Ratios
+15 XP
Further Reasoning With Equivalent Ratios
+15 XP
17
Level 17
0/4
Ratio Tables
+15 XP
Graphing Ratios
+15 XP
Unit Rates
+15 XP
Solving Problems Using Unit Rates
+15 XP
18
Level 18
0/4
Speed as a Unit Rate (#3593)
+15 XP
Solving Unit Rate Problems Using Ratios of Fractions
+15 XP
Identifying Proportional Relationships
+15 XP
Proportional Relationships in the Real World
+15 XP
19
Level 19
0/4
Writing and Solving Proportional Equations
+15 XP
Constant of Proportionality
+15 XP
Understanding Percentages Using Models
+15 XP
Converting Between Percentages and Fractions
+15 XP
20
Level 20
0/4
Converting Between Percentages and Decimals
+15 XP
Finding Part of a Number Given a Whole and a Percentage
+15 XP
Finding a Percentage Given Two Numbers
+15 XP
Finding a Percentage Given Two Numbers: Word Problems
+15 XP
21
Level 21
0/4
Finding a Total Given a Part and a Percentage
+15 XP
Applying Subsequent Percentages
+15 XP
Applying Percentage Increases
+15 XP
Applying Percentage Decreases
+15 XP
22
Level 22
0/4
Percentage Change
+15 XP
Finding Original Values From Percentage Increases (#6646)
+15 XP
Finding Original Values From Percentage Decreases
+15 XP
Introduction to Algebraic Expressions
+15 XP
23
Level 23
0/4
Constructing Algebraic Expressions
+15 XP
Evaluating Linear Expressions
+15 XP
Evaluating Rational Expressions
+15 XP
Identifying Terms in Linear Expressions
+15 XP
24
Level 24
0/4
Identifying Coefficients and Constants
+15 XP
The Greatest Common Factor of Two Linear Expressions
+15 XP
Identifying Like Terms in Linear Expressions
+15 XP
Collecting Like Terms in Linear Expressions
+15 XP
25
Level 25
0/4
Applying the Distributive Law With Linear Expressions
+15 XP
The Distributive Law With Three Terms
+15 XP
Distributing the Negative Sign in a Linear Expression
+15 XP
Simplifying Linear Expressions Using the Distributive Law
+15 XP
26
Level 26
0/4
Simplifying Linear Expressions: Minus Signs
+15 XP
Simplifying Linear Expressions Containing Fractions
+15 XP
Factoring Numerical Expressions
+15 XP
Factoring Linear Expressions
+15 XP
27
Level 27
0/4
Solving Linear Equations by Trial and Error
+15 XP
Solving One-Step Addition and Subtraction Equations
+15 XP
Solving One-Step Multiplication and Division Equations
+15 XP
Solving Two-Step Equations
+15 XP
28
Level 28
0/4
Solving Linear Equations With Fractional Coefficients
+15 XP
Solving Linear Equations With Decimal Coefficients
+15 XP
Solving Linear Equations With Variables on Both Sides
+15 XP
Solving Linear Equations by Clearing Rational Expressions
+15 XP
29
Level 29
0/4
Solving Linear Equations Using Cross-Multiplication
+15 XP
Solving Two-Variable Equations
+15 XP
Linear Equations With Infinitely Many Solutions and No Solution
+15 XP
Linear Equations With No Solutions
+15 XP
30
Level 30
0/4
Inequalities
+15 XP
Verifying Solutions of Linear Inequalities
+15 XP
Solving One-Step Inequalities
+15 XP
Solving Two-Step Inequalities
+15 XP
31
Level 31
0/4
Representing Solutions to Inequalities on Number Lines
+15 XP
Solving Linear Inequalities
+15 XP
Solving Inequalities
+15 XP
The Cartesian Coordinate System
+15 XP
32
Level 32
0/4
Absolute Value Distance Between Two Points
+15 XP
Two-Variable Linear Equations and Their Solutions
+15 XP
Graphing Linear Equations
+15 XP
Equations of Horizontal and Vertical Lines
+15 XP
33
Level 33
0/4
Computing Slope of Straight Lines
+15 XP
Properties of Line Graphs in Slope-Intercept Form
+15 XP
Introduction to Systems of Linear Equations
+15 XP
Solving Systems of Equations by Substitution
+15 XP
34
Level 34
0/4
Units of Area and Volume
+15 XP
Points, Lines, Rays, and Segments
+15 XP
Parallel and Perpendicular Lines
+15 XP
Measure of Line Segments
+15 XP
35
Level 35
0/4
Congruent Segments
+15 XP
Midpoints
+15 XP
Collinear Points
+15 XP
The Segment Addition Postulate
+15 XP
36
Level 36
0/4
Angle Measurement in Degrees
+15 XP
Converting Angles and Circles
+15 XP
Measuring Angles Using a Protractor
+15 XP
Sums of Angles
+15 XP
37
Level 37
0/4
Right, Straight, Flat, and Reflex Angles
+15 XP
Acute, Obtuse, and Right Angles
+15 XP
Congruent Angles
+15 XP
Vertical Angles
+15 XP
38
Level 38
0/4
Solving Problems With Angles
+15 XP
Angles, Perpendicular Lines, and Parallel Lines
+15 XP
Complementary Angles
+15 XP
Non-Adjacent Complementary Angles
+15 XP
39
Level 39
0/4
Supplementary Angles
+15 XP
Corresponding Angles
+15 XP
Alternate Angles
+15 XP
Angle Criteria for Parallel Lines
+15 XP
40
Level 40
0/4
Angle Bisectors
+15 XP
Adjacent Angles
+15 XP
Interior Angles of Triangles
+15 XP
Exterior Angles of Triangles
+15 XP
41
Level 41
0/4
Problem Solving With Angles of Triangles
+15 XP
Classifying Triangles
+15 XP
The Triangle Inequality
+15 XP
The Isosceles Triangle Theorem
+15 XP
42
Level 42
0/4
Heights of Triangles
+15 XP
Congruent Triangles
+15 XP
Polygons
+15 XP
Interior Angles of Polygons
+15 XP
43
Level 43
0/4
Exterior Angles of Polygons
+15 XP
Regular Polygons
+15 XP
The Perimeter of a Polygon
+15 XP
Classifying Quadrilaterals
+15 XP
44
Level 44
0/4
Properties of Rectangles and Squares
+15 XP
Properties of Trapezoids
+15 XP
Area of Rectangles and Squares
+15 XP
Area of Parallelograms
+15 XP
45
Level 45
0/4
Area of Triangles
+15 XP
Area of Trapezoids
+15 XP
Areas of Composite Shapes
+15 XP
The Area Between Two Shapes
+15 XP
46
Level 46
0/4
Introduction to Statistics
+15 XP
The Mean of a Data Set
+15 XP
The Median of a Data Set
+15 XP
The Mode of a Data Set
+15 XP
47
Level 47
0/4
Range, Quartiles, and IQR
+15 XP
Mean Absolute Deviation
+15 XP
Comparing Data Sets Using Measures of Centrality
+15 XP
Comparing Data Sets Using Range and Quartiles
+15 XP
48
Level 48
0/4
Comparing Data Using Measures of Variability
+15 XP
Outliers
+15 XP
Removing Outliers
+15 XP
Finding the Middle of a Data Set
+15 XP
49
Level 49
0/4
Comparing Data Distributions
+15 XP
Frequency Tables
+15 XP
Representing Data Using Dot Plots
+15 XP
Measuring Centrality From Dot Plots
+15 XP
50
Level 50
0/4
Symmetry, Skew, and Outliers
+15 XP
Box Plots
+15 XP
Comparing Data Distributions Using Histograms
+15 XP
Comparing Measures of Center
+15 XP
51
Level 51
0/4
Comparing Measures of Spread
+15 XP
Comparing Distributions Using Statistical Measures
+15 XP
Multiplying Numbers in Scientific Notation
+12 XP
Histograms
+12 XP
52
Level 52
0/4
The Power of a Product Rule for Exponents
+9 XP
Unit Rates Associated With Ratios of Fractions
+9 XP
Solving Problems Using Multiplication and Division of Rational Numbers
+9 XP
Understanding Proportional Relationships From Descriptions
+9 XP
53
Level 53
0/4
Addition and Subtraction in Scientific Notation
+12 XP
The Fundamental Theorem of Arithmetic
+6 XP
Subtracting a Positive Fraction From a Smaller Fraction
+12 XP
Applying Percentages in Succession
+9 XP
54
Level 54
0/4
Understanding Proportional Relationships Using Graphs
+9 XP
Solving Problems Using Addition and Subtraction of Rational Numbers
+12 XP
Understanding Proportional Relationships Using Tables
+12 XP
Simplifying Linear Expressions When a Group of Terms Is Subtracted
+12 XP
55
Level 55
0/4
Surds
+12 XP
Compound Inequalities
+12 XP
Evaluating Numerical Expressions Containing Radicals
+12 XP
Equations of Lines in Slope-Intercept Form
+12 XP
56
Level 56
0/4
Connecting Angles and Circles
+9 XP
Further Addition in Scientific Notation with Different Powers of Ten
+9 XP
Calculating Slopes of Straight Lines
+12 XP
Distances Between Points in the Coordinate Plane
+9 XP
57
Level 57
0/4
Angles and Measures of Angles
+9 XP
Measuring Range and MAD From Dot Plots
+6 XP
Right, Straight, Full, and Null Angles
+9 XP
Measuring Quartiles and IQR from Dot Plots
+9 XP
58
Level 58
0/4
Acute, Obtuse, and Reflex Angles
+9 XP
Comparing Data Sets Using Standard Deviation and MAD
+12 XP
Segment Bisectors and the Perpendicular Bisector Theorem
+9 XP
Comparing Data Set Visualizations Using Standard Deviation and MAD
+12 XP
59
Level 59
0/3
Dot Plots
+12 XP
Congruent Polygons
+12 XP
Consecutive Angles
+12 XP
