Understanding Expressions

What is an expression in mathematics?

• A combination of numbers and variables with an equal sign

• A sentence describing a mathematical operation

• A statement that always includes addition

• A combination of numbers and variables without an equal sign

How would you write an expression for subtracting 30 from 76 and then dividing by 2?

• (76 / 30) - 2

• 76 / (30 - 2)

• 76 - (30 / 2)

• (76 - 30) / 2

If you have the expression 9 * (15 - 6), what does it represent?

• The sum of nine, fifteen, and six

• Nine times the difference between fifteen and six

• The difference between nine and the product of fifteen and six

• Nine times the sum of fifteen and six