Match the Model of One-Step Equations

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

Use the bar model to complete the number sentences.

Choose ALL of the equations that match the bar model.

• 2 + 7 = 9

• 7 + 2 = 9

• 9 - 2 = 11

• 9 - 7 = 2

What is the missing number?

• 3

• 6

• 7

• 9

Write the equation for the model.

• 10=2-x

• -10=-x+2

• -10=x-2

• -10=x+2

Write the equation for the model.

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

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

50 = x + (- 10)

• 55

• 60

• 40

• 70

n + 4 = 12

• 16

• 3

• 8

• 7

x - 7 = 2

• 5

• 9

• 7

• 14