1. ALGEBRA MAGIC

2. STANDARDS  7.EE.1 – Apply properties of operations as strategies to add, subtract, factor, and expand linear expressions with rational coefficients.  7.EE.2 - Understand that rewriting an expression in different forms in a problem context can shed light on the problem and how the quantities in it are related.

3. DIRECTIONS 1.Think of a number

4. DIRECTIONS 2.Square it

5. DIRECTIONS 3.Add the result to your original number

6. DIRECTIONS 4.Divide by your original number

7. DIRECTIONS 5.Add 15

8. DIRECTIONS 6.Subtract your original number

9. DIRECTIONS 7.Divide by 2

10.  Grab a partner  Check your partner’s math QUIETLY PLEASE! PARTNER UP

11. Did you and your partner get the same answer?

12. PARTNER UP What was it?

13. 8 PARTNER UP

14. HOW’D I KNOW THAT?  A magician never reveals his secrets  Luckily, it’s not magic at all  You can do it too  You can make it equal any number in the world!

15. DOES IT ALWAYS WORK?

16. PARTNER BACK UP  With your partner, try to deduce why this works for any number  Try to come up with your own “magic trick”

17. WHAT’S THE MATH LOOK LIKE? 1.Think of a number

18. WHAT’S THE MATH LOOK LIKE? 2.Square it

19. WHAT’S THE MATH LOOK LIKE? 3.Add the result to your existing number

20. WHAT’S THE MATH LOOK LIKE? 4.Divide by your original number

21. WHAT’S THE MATH LOOK LIKE? 5.Add 15

22. WHAT’S THE MATH LOOK LIKE? 6.Subtract your original number

23. WHAT’S THE MATH LOOK LIKE? 7.Divide by 2

24. LET’S LOOK AT IT MORE CLOSELY

25. LET’S FOCUS UP TOP

26. SO NOW THIS

27. BECOMES THIS

28. ASSOCIATIVE PROPERTY

29. NOW YOU TRY IT!  Create a magic trick like this on your own  RULES Must be at least 6 steps long One step must include squaring the original number This will eliminate any x – x + 1 – 1 + 2 – 2 + 3 = 3 responses