Writing Expressions and Equations

Front

What is an expression in mathematics?

Back

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

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing an equal sign (=).

Front

How do you represent 'q tshirts plus $12 is $42' as an equation?

Back

q + 12 = 42.

Front

What does '15 more than Pam spent' mean in terms of an expression?

Back

It means you add 15 to the amount Pam spent, represented as p + 15.

Front

How do you write a multiplication equation for Cheryl's earnings?

Back

8h = 96, where h is the number of hours worked.

Front

What is the solution to the equation 8h = 96?

Back

h = 12, meaning Cheryl worked 12 hours.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign and represents a value, while an equation states that two expressions are equal.

Front

How can you check if your solution to an equation is correct?

Back

You can substitute the solution back into the original equation to see if both sides are equal.