Equation Versus Expression

An ________ says that two expressions are equivalent. 

• equation
• expression
• variable
• evaluation

x-7 is  _______

• an expression
• an equation 
• neither an expression nor an equation.

12 + 5 = 17 is  ______.

• an expression 
• an equation 
• neither an expression nor an equation

6(6) = 36 is ______

• an expression 
• an equation 
• neither an expression nor an equation

Sally went shopping at the mall.  

• Expression 
• Equation 
• Neither 

An equation is 

• located in the center of Earth 
• a combination of number, symbols, and operations
• saying that two expressions are equal 

Hector is buying ten more lemons than Nicole.

• Expression

• Equation

• Neither

What is a variable?

• A mathematical expression
• A symbol that represents an unknown
• A letter that means multiplication
• Simplifying

How do algebraic expressions differ from numerical expressions? 

• They only contain numbers.
• They only contain letters called variables.
• They contain at least one letter called a variable.

3(n) means...

• the product of 3 and an unknown number
• the quotient of 3 and an unknown number
• the sum of 3 and an unknown number
• the difference between 3 and an unknown number