Casio fx-82AU - Page 4

Page 4 of 11 Learning Skills @ CSU
This key is the power key
Example 3.5:
a.
4
8
(this means
8888
)
Calculator steps: 8 4 ) =
Remember to close the bracket after entering the power
Answer = 4096
b. (-0.8)
5
Calculator steps: ( (-) 0 ● 8 ) 5 =
Answer = -0.32768
log A logarithm is an alternative way of writing a number.
It is particularly useful when working with large numbers.
Example 3.6:
log 600 090
Calculator steps: log 6 0 0 0 9 0 ) =
remember to close the bracket after entering the number
Answer = 5.77821639
This key is next to the log key. You may encounter either of these functions in chemistry or
physics subjects. They both involve the base number e, which has an approximate value of
2.7183. The log key mentioned above, as well as our everyday number calculations, revolve
around a base number of 10.
Example 3.7:
3.8
e
Calculator steps: SHIFT 8 ● 3 ) =
remember to close the bracket
Answer = 4023.872394
x
x
e
ln
e
ln
x