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Powers & Roots
Laws
+ If the base numbers are the
same, you add powers to multiply.
9 27 9+27 36
eg. 7 x 7 = 7 =7
+ If the base numbers are the
same you subtract powers to divide
eg. 18 ÷ 18 = 18 = 18
7 5 7-5 2…read more

Slide 3

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Powers & Roots
Laws
power of
+ Anything to the
`0' is 1
eg. 2410 = 1
0…read more

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Powers & Roots
Negative Powers
Trigger the inverse reciprocal.
eg. 4 = 1/4 = 1/16
-2 2
or
eg. 2 x 3 =
-2
2
2 x 1/3 = 2 x 1/9 = 2/9…read more

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Powers & Roots
Fractional Powers
+ these mean roots; power ½ =
square root
eg. 36 = 36 = 6
1/2
+ the power 1/3 requires you to find
the cube root…read more

Slide 6

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Powers & Roots
Fractional Powers
+ power 1/3 = cube root
+ power ¼ = fourth root
etc.
2/3 1/3 2 2
eg. 27 = (27 ) = 3 = 9…read more

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