Modeling and One Step Equations with Addition and Subtraction with Algebra Tiles

What equation matches 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

• Answer not Given

Which equation below represents the algebra tiles?

Which equation below represents the algebra tiles?

What equation is represented by these tiles?

What would you do to isolate the variable?

• Take away 6 positive unit tiles from both sides of the equation.

• Add 2 negative unit tiles to both sides of the equation.

• Add 6 negative unit tiles to both sides of the equation.

• Add 6 positive unit tiles to both sides of the equation.

An equation is modeled. What value of x makes the equation true?

• -3

• 1

• -1

• 3

What equation is modeled?  Solve the equation.

• 2x = -4    x = -2

• 2x = 4    x = 2

• 2x = 4    x = 8

Write the equation for the model. (white square=1 rectangle=x red square = -1)

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

What would be the next step?

• Take away the 6 positives on the left so that the variable is isolated.

• Bring in 6 negatives on the left.

• Move the 6 positives on the left, and place them on the right as negatives.

• Leave it alone

• A

• B

• C

• D