General

Q10
Is it possible to accomplish time calculations with scientific calculators?
A10
Yes. It is possible. The sexagesimal base number is based on the number 60. This base number is used for time and angle measurement.
Time measures( 1 hour=60 minutes, 1 minute =60seconds) Casio scientific calculators can carry out time calculations as well as angle calculations .

The following are calculations using the fx-115MS. Operation on other scientific calculator models ( fx-991MS, fx-115WA, fx-991WA, fx-3650P, fx-82ES, etc.) is similar.

Examples:
To convert the decimal value 2.258 to a sexagesimal value
Key Operation:
 [2] [.] [2] [5] [8] [=] [ °‘‘‘ ]
Displayed Result:  2° 15° 28.8°   (2 hours 15 minutes and 28.8 seconds)

Time calculation with sexagesimal values:
5 hours 34 minutes and 48 seconds are to be added to 8 hours 16 minutes and 51 seconds.
Key Operation:
 [5] [ °‘‘‘ ] [3] [4] [ °‘‘‘ ] [4] [8] [ °‘‘‘ ] [+] [8] [ °‘‘‘ ] [1] [6] [ °‘‘‘ ] [5] [1] [ °‘‘‘ ] [=]
Displayed Result:  13°51°39°  (13 hours 51 minutes and 39 seconds)

The result can be converted into decimal value.
Key Operation  [ °‘‘‘ ] 
Displayed Result:  13.86083333

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