2-step Equations

Addition & Subtraction

100

Solve and check: 

x - 4 = 7

x - 4 = 7 

   +4   +4 

x = 11 

CHECK! (11) - 4 = 7

200

Solve and check: 

x − 21 = 6

x − 21 = 6 

   +21   +21 

        x = 27 

CHECK: (27) - 21 = 6

300

Solve and check:

x + 17  = 6

x + 17 = 6

   - 17    -17

      x = -11

CHECK: (-11) + 17 = 6

400

Solve and check:

x + (-10) = 17

x + (-10) = 17

       +10    +10

          x   = 27

CHECK:   27 + (-10) = 17

500

Solve and check:

x + 3.5 = 9.4

x + 3.5 = 9.4

   - 3.5    -3.5

         x = 5.9

CHECK: (5.9) + 3.5 = 9.4

Multiplication & Division

100

Solve and check:

5y = 30

y = 6

CHECK: 

5(6) = 30

200

Solve and check: 

y/3 = 9

y = 27

CHECK:  27/3 = 9

300

Solve and check: 

-4y = 28

y = -7

CHECK: -4(-7) = 28

400

Solve and check: 

2.5y = 10

y = 4

CHECK:   2.5(4) = 10

500

**DAILY DOUBLE**

2/3 (y) = -18

2/3 (y) = -18

/ 2/3         / 2/3

         y = -27

CHECK:  2/3 (-27) = -18 

2-step Equations

100

Solve and check:

5z + 3 = 13

5z + 3 = 13

     - 3    -3

        5z = 10

       /5       /5

          z = 2

CHECK: 5(2) + 3 = 13

200

Solve and check:

4z - 13 = 7

4z - 13 = 7

      +13   +13

      4z = 20

      /4       /4

        z = 5

CHECK: 4(5) - 13 = 7

300

Solve and check: 

-z - 10 = -6

-z - 10 = -6

    +10    +10

    -1z  = 4

   /-1      /-1

       z = -4

CHECK: -(-4) - 10 = -6

400

Solve and check:

-(1/2) z + 3 = -37

-(1/2) z + 3 = -37

             - 3      -3 

      -(1/2) z = -40

       /-(1/2)      /-(1/2)

               z = 80

CHECK: -(1/2)(80) + 3 = -37

500

Fill in the blanks for the steps to solve a 2-step equation.

What is the __________ doing?  

Do the __________  on  _______  sides.

______  or  __________ 1st!

Variable

Opposite

Both

Add

Subtract

More 2-step Equations

100

In the equation:    3a - 5 = 16

What is the first step?

Add 5 on both sides.

200

In the equation:    a/5 + (-16) = -14

What is the 1st step to solve?

Add 16 on both sides.

(...or subtract -16 on both sides!)

300

In the equation:  a/5 + (-14) = -16

What is the 2nd step to solve?

Multiply by 5 on both sides.

400

In the equation:   -a - 2/3 = -13/3

what would be the 2nd step to solve?

Divide (or multiply) by -1.

500

Solve and check:

a/-2  +  3/4 = -13/4

a/-2 + 3/4 = -13/4

        - 3/4     -3/4

         a/-2   = -16/4 = -4

          *-2                  *-2

               a = 8

(8)/-2 + 3/4 = -13/4

Random

100

What team are you on, at Willie J.?

Bravo 7

200

Where did Mr. Scroggins take his family this past Christmas?

Washington DC

300

What are the 3 main objective words for PBIS at Willie J.?

Respectful, Responsible, Safe

400

Why is there no school the Monday after next?

Martin Luther King Day

500

What is the name of Mrs. Saunders' grand daughter who attends Willie J.?

Kaylynn