Sometimes, we don't need to solve an equation right away. Instead, we can use the information in a given word problem to construct a numerical expression that represents the information.

The core idea in algebra is using letters to represent relationships between numbers without specifying what those numbers are! Let's explore the basics of communicating in algebraic …

Let's take a look at a trickier example Write an expression for " m decreased by 7 ". Notice that the phrase "decreased by" tells us to use subtraction. So the expression is m 7 .

Math is full of patterns, puzzles, and expressions, and this unit helps you make sense of them all. You'll explore how parentheses affect expressions, and practice writing, evaluating, and …

Learn ways that we can change an expression's value (such as by changing the values of its variables) or keep the value the same (such as with the distributive property).

Data displays Integers Rational numbers Expressions and equations Ratios and proportions

Which of the following is a correct interpretation of the expression three plus negative seven? So before I even look at these choices, one way I would think about it is I would start at three and …

Learn to write expressions with variables in math! Discover how to represent various operations like addition, subtraction, multiplication, and division using variables.

Learn Scientific notation examples Scientific notation example: 0.0000000003457 Multiplying in scientific notation example Multiplying & dividing in scientific notation Multiplying three …

Sometimes, we don't need to solve an equation right away. Instead, we can use the information in a given word problem to construct a numerical expression that represents the information.