Expressions and Equations

A number sentence WITH an equal sign (=)

• Equation

• Factor

• Product

• Expression

Answer explanation

Equations DO have an =

A letter that represents a number

• Number

• Variable

• Alphabet

• Letter

Answer explanation

A variable represents an unknown number

The rule that tells us the order to simplify expressions

• Expressions

• Equations

• Order of Operations

• Pythagorean theorem

Answer explanation

Remember: George, Please Excuse My Dear Aunt Sally (Grouping/Parentheses, Exponents, Multiplication, Division, Addition, Subtraction)

Which words should go in the yellow / left side of this venn diagram?

• Has an equal sign, can be solved

• Does not have an equal sign, can not be solved

• Has numbers and/or variables

Is this true for an expression or an equation?

• expression

• equation

• both expression and equation

• neither

Is this true for an expression or an equation?

• expression

• equation

• both expressions and equations

• neither

Is this true for an expression or an equation?

• expression

• equation

• both expressions and equations

• neither

Which words should go in the blue / right side of this venn diagram?

• has an equal sign, can be solved

• does not have an equal sign, can not be solved

• has numbers and/or variables

Which words should go in the green / middle of this venn diagram?

• has an equal sign, can be solved

• does not have an equal sign, can not be solved

• has numbers and/or variables

Mrs. Waldvogel has a rectangular garden in her backyard. Her garden is 4.55 meters wide and 17.4 meters long. Round the length and width of Mrs. Waldvogel's garden to the nearest whole number to estimate the perimeter of her garden. Choose the equation that best models this situation.

• 20 + 4 = 24 meters

• 17 + 5 = 22 meters

• 20 + 20 + 4 + 4 + = 48 meters

• 17 + 17 + 5 + 5 = 44 meters