Write Equations with Unknown Variables (1)

What is a variable?

• It's a number equation.

• A letter representing an unknown number in an equation.

• The symbols in an equation that aren't letters or numbers.

• Any equation with an equals sign.

Tags

CCSS.6.EE.A.2B

What does "product" mean?

• Multiply
• Divide
• Add
• Subract

Tags

CCSS.3.OA.A.1

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign
• Expressions do not have an equal sign and equations do have an equal sign
• There is not a difference
• Expressions do not have variables and equations have variables

What does "difference" mean?

• add
• subtract 
• multiply
• divide

Tags

CCSS.6.EE.A.2A

Translate the sentence into an equation:

Seven subtracted from n is 18

• n + 7 = 18

• 7 - n = 18

• n - 7 = 18

• n + 7 = 18n

Translate the sentence into an equation:

Four more than six times a number is 18.

• 4 + 6x = 18

• 4x + 6 = 18

• 6x + 4 = 18

• not enough info

How would you translate
x - 5 = 12 into words?

• x - 5 = 12
• The product of x and 5 is twelve
• x less than 5 is 12
• Five less than x is 12.

Tags

CCSS.6.EE.A.2A

Which choice models this situation?

Robyn had some video games, then bought 4 more. Now she has a total of 10 games.

• v - 4 = 10

• v + 4 = 10

• 10/4 = v

• 4v = 10

Tags

CCSS.HSA.CED.A.3

Write an algebraic expression for:

35 decreased by a number

• 35+n

• 35-n

• n-35

Tags

CCSS.6.EE.A.2A

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

Tags

CCSS.RF.3.3B

CCSS.RF.3.3C

CCSS.RF.3.3D

CCSS.RF.4.3A

CCSS.RF.5.3A