Math

Math (X) - Khan Academy (X)

Introduction to Percentages: Percentage of a Whole Number

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There are several different ways to solve problems involving percentages, decimals, and fractions. Watch as we find the percentage of a whole number.

Constructing a Box-and-Whisker Plot

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Here's a word problem that's perfectly suited for a box and whiskers plot to help analyze data. Let's construct one together, shall we?

Simple Equations: Examples Solving a Variety of Forms

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Use these examples to practice solving a variety of one step equations, using all four operations (addition, subtraction, multiplication, and division).

Inequalities: Word Problems

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Practice writing inequalities by using information from the word problems.

Reading and Interpreting Data: Reading Line Graphs

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A line graph is another way to visually represent data, especially data that changes over time. Let's take a look at this example.

Unit Conversion: Multi-step Word Problem - Squirrel Survival

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The fate of a squirrel is in your hands as it tries to run across the road. Use unit conversion to solve the problem.

Equivalent Expressions: Combining Like Terms

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This module will help you understand how to combine like terms in expressions.

Introduction to Percentages: Finding a Percentage

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Use fractions to find a percentage, and learn there are different ways to arrive at the answer.

Manipulating Expressions: Combining Like Terms Explained

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Another good explanation of how we combine like terms in algebra. This will totally make sense.

Introduction to Percentages: the Meaning of Percent

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Start by thinking about what percent really means. Once you understand this, other pieces will begin to fall into place.

Evaluating Expressions with Variables: Two Variables

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We've done a few examples where we were faced with one variable. Why not try one that has two variables?

Solving Basic Equations: Simple Equations of the Form x + a = b

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Here's another one-step equation to solve. This one adds a number to the variable. Which operation is opposite of addition?

Ratios and Proportions: Ratio Word Problem - Boys to Girls

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In this example, we are given a ratio and then asked to apply that ratio to solve a problem.

Negative Number Basics: Ordering Negative Numbers from Least to Greatest

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Is -40 bigger than -10? When ordering negative numbers, don't get stuck on the "amount" of the number. Think about what that negative sign really means!

The Coordinate Plane: Plotting Points and Interpreting Placement

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Let's get familiar with the x/y coordinate plane--plotting points and interpreting the placement of points on a plane.

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