Writing Expressions/Equations with Review

Front

What is an expression in mathematics?

Back

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

Front

What does it mean to 'increase by' a number?

Back

To 'increase by' a number means to add that number to another value.

Front

How do you write 'twice a number h increased by 5' as an expression?

Back

2h + 5

Front

What is the equation for 'the sum of x and ten is twenty'?

Back

x + 10 = 20

Front

How do you express 'twelve fewer questions than were on the first test'?

Back

q - 12

Front

What is the expression for 'the cost of 3 CDs and a $10 DVD'?

Back

3c + 10

Front

How do you write 'four less than 9 times a number' as an equation?

Back

9x - 4 = 176

Front

What does 'the difference of two numbers' mean?

Back

It refers to the result of subtracting one number from another.

Front

What is a variable in an equation?

Back

A variable is a symbol (often a letter) that represents an unknown value.

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.