1. October 7, 2015 Warm-Up:Warm-Up:

2. Homework Worksheet 4.2

3. It’s a… GIRL!!!

4. Objective Write down the objective in your math journal in your own words. SWBAT solve one-step algebraic equations.

5. Step 1If you do not have an equation mat, draw one like the one seen below on a blank sheet of paper. Step 2On your equation mat, place a variable cube on one side with 3 negative integer chips. On the other side of the mat, place 5 positive integer chips. This represents the equation x − 3 = 5.

6. With your group, decide how to evaluate what x is equal to by adding or removing chips. ** You must add or remove the same amount from both sides!

7. Good to Know! You can solve equations using inverse operations to keep your equation balanced. Inverse operations are operations that undo each other, such as addition and subtraction.

8. Good to Know! Even though you may be able to solve many one-step equations mentally, it is important that you show your work. The equations you will be solving in later lessons and in future math classes will become more complex. Drawing a vertical line through the equals sign can help you stay organized. Whatever is done on one side of the line to cancel out a value must be done on the other side.

9. Example 1 Solve the equation. Show your work and check your solution. a.x + 13 = 41  Check the answer by substituting the solution into the original equation for the variable. x + 13 = 41 –13 –13 x = 28 (28) + 13 = 41 41 = 41 The vertical line can help you stay organized.

10. Practice  Each person needs a whiteboard and marker  Your group can share some towels It is important to show your work for each problem!!!

11. Show your work!! Solving one-step equations

12. Problem 1

13. Problem 2

14. Problem 3

15. Problem 4

16. Problem 5

17. Problem 6

18. Problem 7

19. Problem 8

20. Problem 9

21. Problem 10