7th grade

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Negative numbers: addition and subtraction

Add and subtract negative numbers, and see how absolute value can be used to find the distance between any two numbers on the number line.
Intro to adding negative numbers
Intro to subtracting negative numbers
Adding & subtracting integers
Adding & subtracting with negatives on the number line
Adding & subtracting negative fractions
Addition & subtraction word problems with negatives
Absolute value
Properties of addition & subtraction
Adding & subtracting negative numbers: variables

Negative numbers: multiplication and division

Learn to multiply and divide negative numbers. Once you've got the basics down, we'll revisit fractions, exponents, and order of operations but this time with negatives!
Multiply & divide negative numbers
Multiplication & division word problems with negatives
Multiply & divide negative fractions
Understanding multiplying and dividing fractions
Exponents with negative bases
Dividing by zero
Order of operations
Properties of multiplication & division

Fractions, decimals, & percentages

In these tutorials, we'll explore the number system. We'll convert fractions to decimals, operate on numbers in different forms, meet complex fractions, and identify types of numbers. We'll also solve interesting word problems involving percentages (discounts, taxes, and tip calculations).
Converting fractions to decimals
Adding & subtracting rational numbers
Percent word problems
Rational number word problems

Rates & proportional relationships

Learn all about proportional relationships. How are they connected to ratios and rates? What do their graphs look like? What types of word problems can we solve with proportions?
Rate problems with fractions
Identifying proportional relationships
Graphs of proportional relationships
Writing & solving proportions
Equations of proportional relationships

Expressions, equations, & inequalities

Bring on the algebra! Learn how to manipulate expressions and solve equations and inequalities.
Combining like terms
The distributive property & equivalent expressions
Interpreting linear expressions
Two-step equations intro
Two-step equations with decimals and fractions
Two-step equation word problems
One-step inequalities
Two-step inequalities

Geometry

Geometric shapes are all around us. The world is built with them. In this series of tutorials and exercises you'll become familiar with Euclidean geometry and terms like segments, scale drawings, parts of a circle, area, volume, angles, and geometric figures.
Area and circumference of circles
Area and circumference challenge problems
Vertical, complementary, and supplementary angles
Missing angle problems
Constructing triangles
Slicing geometric shapes
Scale drawings
Volume problems

Statistics and probability

This introduction to probability and statistics explores probability models, sample spaces, compound events, random samples, and a whole lot more.
Basic probability
Probability models
Compound events and sample spaces
Comparing and sampling populations

Staff picks

Adding & subtracting negative numbers
Multiplying & dividing negative numbers
Intro to combining like terms
Two-step equations
Writing proportions example

Review articles

Subtracting negative numbers review
Multiplying negative numbers review
Adding negative numbers review
Area of circles review
Complementary and supplementary angles review

Get Started

Intro to adding negative numbers
Learn how to add negative numbers. By the end of this tutorial, you'll be solving problems like 4 + (-7) with ease!
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