Math 9 2 - School District 67 Okanagan Skaha
Math 9 2.1
What is a Power?
When texting or face-booking people use the strangest language yet everyone seems to understand it.
What do the following mean?
lol
thx
tmi
wbs
swdyt
ttfn
sum1
Pos
Why do people use these shortcuts?______________________________
_________________________________________________________
_________________________________________________________
Mathematicians also used shortcuts many years ago. One such shortcut is the EXPONENT.
An exponent is a short cut for__________________________________
36，6，6,6Eg.
There are 3 new terms used when we write using this shortcut.
Base:________________________________________
Exponent:_____________________________________
Power:________________________________________
Powers can be rewritten as a repeated multiplication and in standard form.
Fill in the chart:
Power Repeated Multiplication Standard Form
4 3
2，2，2，2，2
125
7
Eg. In the following, identify the base and then evaluate:
4 1. base=_____ value=_______ (,3)
4 2. base=_____ value=_______ ,3
4 3. base=_____ value=_______ ,(,3)
Can you use your calculator to find powers?
4 1. 7,
6 2. (,4),
5 3. ,4,
On my calculator the exponent key is_________
Two special cases:
Powers with exponents of 2__________________________
_______________________________________________
Powers with exponents of 3___________________________
_______________________________________________
Discuss:
Can every integer, other than 0, be written as a power? Explain__________
_________________________________________________________
_________________________________________________________
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