Evaluating Expressions with Variables

Which of the following is NOT one of the four main mathematical operations?

• Multiplication

• Addition

• Subtraction

• Exponentiation

How would you write the expression 'three more than a number' using a variable?

• n - 3

• 3 * n

• 3 - n

• 3 + n

What is the correct way to write the product of 12 and a number in algebra?

• 12 * n

• 12n

• 12 x n

• n12

Which of the following is NOT a correct way to write the product of 12 and a number?

• 12n

• 12 * n

• n12

• 12 x n

How should you write the quotient of a number and 3 in algebra?

• n / 3

• 3 / n

• n * 3

• 3 * n

What does the phrase 'less than' indicate in a mathematical expression?

• Addition

• Division

• Subtraction

• Multiplication

How would you correctly write 'five less than a number'?

• 5 - n

• n - 5

• 5 + n

• n + 5

Which subtraction keyword requires special attention because it is read backwards?

• Decreased by

• Minus

• Less than

• Difference

When evaluating expressions, what should you use to replace variables?

• Square brackets

• Curly braces

• Bubbles (empty parentheses)

• Brackets

If m = 3 and n = 5, what is the value of the expression 15 * m?

• 45

• 50

• 35

• 153