1. What is a variable?
Our focus here is understanding that a variable is just a symbol that can represent different values in an expression. We got this. Just watch.
2. Why aren't we using the multiplication sign?
Great question. In algebra, we do indeed avoid using the multiplication sign. We'll explain it for you here.
5. Evaluating expressions with two variables
Practice evaluating expressions in two variables by plugging in values for the variables.
6. Evaluating expressions with variables: cubes
In this example of evaluating expressions, we're dusting off some geometry. On top of that, it's a word problem. We're seeing how different concepts in math are layered on top of each to create more interesting and complex problems to solve.
7. Evaluating expressions with variables word problems
Practice plugging in values to evaluate real-world algebraic expressions. These are introductory problems, so the expressions aren't too complicated.
9. Writing expressions with variables
Practice writing algebraic expressions to match verbal descriptions of mathematical operations.