fx-82MS fx-82TL fx-9860GII
log
On a Casio calculator you can calculate common logarithms of base 10
log
Example 1
To calculate log (1) = 0
log 1 = log 1
0.
because 100 = 1.
Example 2
To calculate log (1000) = 3
log 1 0 0 0 = log 1000
3.
because 103 = 1000.
Example 3
To calculate log (27.83) = 1.4445…
log 2 7 • 8 3 = log 27.83
1.444513206
because 101.4444513206 = 27.83.
Example 4
To calculate log (0.1) = −1
log 0 • 1 = log 0.1
-1.
Example 5
To calculate log3 (9) = 2
log 9 ÷ log 3 = log 9÷log 3
2.
Details
The functions log and 10x are on the same key. That is so because these functions have to do with the number 10.