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log

On a Casio calculator you can calculate common logarithms of base 10

log

or via the CATALOG as

CATALOG  P INPUT
SHIFT 4  log   F1

 


Example 1

To calculate log (1) = 0

log  1  EXE log 1
0

because 100 = 1.

 


Example 2

To calculate log (1000) = 3

log  1   0   0   0  EXE log 1000
3

because 103 = 1000.

 


Example 3

To calculate log (27,83) = 1,4445…

log  2   7      8   3  EXE log 27.83
1.444513206

because 101,4444513206 = 27.83.

 


Example 4

To calculate log (0,1) = −1

log  0      1  EXE log 0.1
-1

because 10−1 = 0.1.

 


Example 5

To calculate log (103) = 3 log (10) = 3 × 1 = 3

log  1   0  ^  3  EXE log 103
3

 


Example 6

To calculate log3 (9) = 2

log  9  EXE ÷ log  3  EXE Ans÷log3
2

which of course you can also calculate as

logab
log(▯)  3   ▷   9  EXE log₃(9)
               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.

 


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