TEKS 5.4B: Equations & Expressions

An equation is a mathematical statement that asserts the equality of two expressions, typically containing variables and constants.

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

You can represent the total number of items bought by multiplying the number of packages by the number of items in each package, e.g., if Susan buys 3 packages of 8 apples, the equation is $$3(8)$$ .

In a mathematical context, 'left' refers to the remaining quantity after a certain amount has been subtracted from a total.

To calculate the total time, multiply the number of songs by the duration of each song and then sum the results for different songs.

The formula to find the total ounces of soda is $$\text{Number of cans} \times \text{Ounces per can}$$ .

Sharing equally means dividing a total quantity into equal parts among a certain number of recipients.

You express the total amount after earning money by adding the initial amount to the product of hours worked and the hourly wage, e.g., $$\text{Total} = \text{Initial Amount} + (\text{Hours} \times \text{Wage})$$ .

An equation includes an equals sign and states that two expressions are equal, while an expression does not include an equals sign.

Parentheses are used to indicate which operations should be performed first in an expression.