Math 6 Q3 L7 Algebraic Equations

What is the most important difference between an expression and an equation?

• they're spelled different

• an equal sign

• only equations have variables

• only expressions have variables

Which of the following is an expression?

• 2x = 4

• 5 + 7

• 5 + x = 13

• 3 + 6 = 9

Which of the following is an equation?

• 5 + 8 = 13

• 2x + 3

• 5 + 9

• 3 + x

Is 5 + (8² - 2) x 2 an equation or expression?

• An equation because there is no variable.

• An expression because there is no variable.

• An equation because there is no equal sign.

• An expression because there is no equal sign.

What makes an 2x + 3 = 4 an equation?

• It has a variable.

• It has an equal sign.

• It has numbers.

• It is not an equation.

Which shows an expression?

• Twelve times a number plus four is six

• Twelve times a number plus four

• Twelve divided by a number is six

• Three plus a number is equal to five

Which of these can be written as an equation?

• Two times 0.75 plus m

• Three less than twice a

• Half the product of five and j

• Four times n is 24

2x + 1 is an example of an...

• expression

• equation

2 + 1 = 3 is an example of

• expression

• equation

3y is an example of

• expression

• equation