WARM~UPS: FIND THE MISSING NUMBER

2• +3=15

5• +10=55 3• -2=19

WTL: WRITE ABOUT THE STEPS YOU USED TO FIND THE MISSING

NUMBER.  EVEN IF YOU DID IT IN YOUR HEAD; WHAT DID YOU THINK ABOUT WHEN SOLVING

THIS PROBLEM?

TURN & TALK WITH YOUR NEIGHBOR.

DID YOU DO THE SAME STEPS OR DIFFERENT?

SOLVING EQUATIONS FROM MODELS

ONE STEP VS TWO STEP EQUATIONS

Can be solved in one step.

Can be solved in two steps.

One Step:

2x = 8

Two Step:

2x + 3 = 11

Similarities

Use + ― x ÷ to solve. What you do to one side you have to do to the

other.

WTL:COMPARE AND CONTRAST ONE AND TWO STEP EQUATIONS.

Turn & Talk with your neighbor.

WHY USE MODELS? Models help us take complicated equations

and break them down into an easier equation.

=

WRITE AND SOLVE THE EQUATION

x x + + + + +

x x x x + + + 1) ____________

=

+ + + + + +

+ + +

x x x + + +

2) ____________

x

WRITE AND SOLVE THE EQUATION

=

3) ______________

x x xx x +++

+ ++ +x x x

WRITE AND SOLVE THE EQUATION

+ + + 4) ___________ x x + +

+ x + + +

+ + +

WRITE AND SOLVE THE EQUATION

5) ______________

6) ______________

7) ______________

k k k1 15

What is the first step in finding the value of x?

A. Add 6 pandas to each side of the model.

B. Subtract 6 pandas from each side of the model.

C. Divide the pandas equally among the 3 x’s.

D. Subtract 3 x’s from each side of the model.

=x x x

8) The model represents 3x = 6

What is the second step in finding the value of x?

A. Divide the pandas equally among the 2 x’s.

B. Subtract 2 x’s from each side of the model.

C. Add 3 pandas to each side of the model.

D. Subtract 3 pandas from each side of the model.

=

9) The model represents 2x + 3 = 5

x x

=

xxxxx - - - -

+ ++ +

What is the first step in finding the value of x?

10) The model represents 5x – 4 = 4