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Inverse Operations. How do we undo an operation?  If I owe Brandie $1 then how can I get rid of my debt?  What math operation would you use to do that?

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Presentation on theme: "Inverse Operations. How do we undo an operation?  If I owe Brandie $1 then how can I get rid of my debt?  What math operation would you use to do that?"— Presentation transcript:

1 Inverse Operations

2 How do we undo an operation?  If I owe Brandie $1 then how can I get rid of my debt?  What math operation would you use to do that?

3 How do we undo an operation?  If I have 8 slugs. How do I get rid of them?  What math operation would you use to do that?

4  If each student in the class gave Ms. Spangler 2 pencils (5x2) so she has 10 pencils total. How do I give back, or distributed, evenly those pencils?  What math operation would you use?

5 Inverse operations

6 NAME THAT OPPOSITE!  IT’s OK to yell out!! +

7 NAME THAT OPPOSITE!  IT’s OK to yell out!! -

8 NAME THAT OPPOSITE!  IT’s OK to yell out!! x

9 NAME THAT OPPOSITE!

10  IT’s OK to yell out!! x

11 NAME THAT OPPOSITE!  IT’s OK to yell out!! -

12 NAME THAT OPPOSITE!

13  IT’s OK to yell out!! +

14 So lets undo some operations +12 -12 =0

15 So lets undo some operations -6 +6 =0

16 So lets undo some operations x6 =1

17  Remember when we add or subtract 0 from an equation it doesn’t change the equation.  5 + 0 = 5  14 - 0  Remember when we multiply

18 So lets undo some operations +4

19 So lets undo some operations

20 -4

21 Learning to Balance Equations  Online Problem Algeblocks  Draw problems out.

22 Math Steps  Steps:  Draw Line down Equal sign  Find the number on the same side as the variable  How is the number connected to the variable (+, -, /, x)  Do the inverse to BOTH SIDES  Solve!

23 Apply to Algebraic Equations  15 + x = 25 +  So we are going to + or –  These are the 2 equations we will solve. 0 + x = 10 x = 10 -15

24 Apply to Algebraic Equations  - 3 + x = 25 +  So we are going to + or –  These are the 2 equations we will solve. 0 + x = 28 x = 28 +3

25 Apply to Algebraic Equations 1x = 6 x = 6 x3

26 Apply to Algebraic Equations  5 - z = 25 +  So we are going to x or /  These are the 2 equations we will solve. 0 - z = 20 - z = 5 -5 x(-1) z = -5

27 Name:______________________ Date:______________________ TEST

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