If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains
*.kastatic.org and *.kasandbox.org are unblocked.
What expressions express
Using the combined powers of Chuck Norris and polar bears (which are much less powerful than Mr. Norris) to better understand what expressions represent and how we can manipulate them.
Great tutorial if you want to understand that expressions are just a way to express things!
In simple addition we learned to add all the numbers together to get a sum. In algebra, numbers are sometimes attached to variables and we need to make sure that the variables are alike before we add the numbers.
So what if we add not just numbers or variables..but expressions? Here's a simple example to get you thinking about this.
Another good explanation (minus Chuck Norris) on the how we combine like terms in algebra. This will totally make sense.
We're going to simplify this expression together putting to use our new knowledge of how to combine like terms. Ok? Let's do it!
This example of combining like terms in an expression get a little hairy. Listen closely.
Simplify algebraic expressions by combining like terms. Coefficients on some terms are negative.
We've learned about order of operations and combining like terms. Let's layer the distributive property on top of this.
Practice combining like terms using the distributive property. These problems involve adding and subtracting negative numbers.
Learn how to expand the following expression that has rational coefficients: 6(-4w + 1/2)
Learn how to apply the distributive property to factor out the greatest common factor from an algebraic expression like 2+4x.
Combine like terms and apply the distributive property to manipulate expressions. All expressions are linear. These problems involve decimals and fractions.
We're looking to find the expressions that are equivalent to a given expression that can be simplified. Give it a try with us.
Practice determining whether or not two algebraic expressions are equivalent by manipulating the expressions. These problems require you to combine like terms and apply the distributive property.