Monday, January 16, 2006

THings That we Did TOday

Working With Negative Bases
Evaluate (standard form)
Positive Bases:
22= 4
23= 8
24= 16
25= 32
Negative Bases:
You can write this in expanded form
-22= -4 -2x2 or 2x2x-1
-23 = -8 -2x2x2 or 2x2x2x-1
-24 = -16 -2x2x2x2 or 2x2x2x2x-1
-25= -32 -2x2x2x2x2 or 2 x2x2x2x2 x - 1
Negative Bases with brackets:
(-2)2= 4 -2x-2
(-2)3 = -8 -2x-2x-2
(-2)4 = 16 -2 x-2 x -2 x-2
(-2)5= -32 -2 x-2 x-2 x-2x-2
Using your brains!! 5x5 = 25 , 5x5x5 = 125
Here's an example:
52= 5x5 = 25
-52= -1x5x5 = -25
(-5)2= -5 x-5 = 25
-(5)2= -1x5x5= -25
-(-5)2= -1x-5x-5 = -25
~~~~~ Get it so far?? Well then you should try it !~~~~~~~
53=
-53=
(-5)3=
-(5)3=
-(-5)3=
Dividing bases:
Exponential form:
Expanded Form :
Answer in Exponential form :
Answer in Standard form:
25÷22=
34÷32=
105÷10=
75÷79=
42÷46=
74÷74=
35÷35=
25÷22=
dont know what to do?? well here's an example. Then do the rest for homework !!
25÷22
expanded form:
2x2x2x2x2
2x2
Answer in exponential form: 23
Answer in standard form: 8
any questions?? leave a comment and i'll try to answer it for you!

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