Writing Expressions

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 does it mean to write an expression for 'Twelve times the number of feet'?

Back

It means to multiply the variable representing feet (f) by 12, resulting in the expression 12f.

Front

How do you express 'Five dollars less than Tim's pay'?

Back

You subtract 5 from Tim's pay (p), resulting in the expression p - 5.

Front

What expression represents 'Half as many students as the math class'?

Back

If s represents the number of students in the math class, then half of that is expressed as s ÷ 2.

Front

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

Back

If q represents the number of questions on the first test, then twelve fewer is expressed as q - 12.

Front

What does 'Four times as many apples' mean in expression form?

Back

If a represents the number of apples, then four times that is expressed as 4a.

Front

What is a variable in an expression?

Back

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

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation states that two expressions are equal.

Front

How do you write an expression for 'The sum of a number and 10'?

Back

If n represents the number, the expression is n + 10.

Front

What does 'Three times a number decreased by 4' look like in expression form?

Back

If x represents the number, the expression is 3x - 4.