Only shows 1 decimal place!!

SOURCE: I have a sharp EL-501W and I want to know how I

Here is a picture to show you how to configure it.

SOURCE: Sharp EL-5100 Manual

I've got a manual in the original box I got 30 yrs ago. The calculator's dial is getting to the unreadable state and I'm just about to turf it all out. Is there any particular function you want to know about?

SOURCE: I need to change the time on my Sharp EL-1750PIII calculator

You can access the .pdf manual for your particular calculator here:

http://www.sharpusa.com/files/cal_man_EL1750PIII.pdf

Page 1 for how to set date/time:

“RATE SET”: To set the date, time, and tax rate, set this switch at the “RATE SET” position.
Date:
• Enter in the order of month, day and year, then press to complete the entry.
• Use to separate month, day, and year.
• When is pressed, the number entered is evaluated and displayed as “date” if the
value is within the following range; “Error” is displayed otherwise, and the previously set
date is restored.
Month: 1 - 12; day: 1 - 31; Year: 2000 - 2099 (in 4 digits) or 00 - 99 (in 2 digits)
Time:
• Enter in the order of hour, minutes, then press to complete the entry.
(There is no entry available for the seconds value. The clock starts at zero second.)
• If the hour/minute digit is less than 10, it is not necessary to enter the first digit “0”.
• Use to separate hour and minute values.
• When is pressed, the number entered is evaluated and displayed as “time” if the
value is within the following range; “Error” is displayed otherwise, and the previously set
time is restored.
Hour: 0 - 23 (24-hour system for the hour entry), Minute: 0 - 59

SOURCE: Half-life exponential problem. Can't get the same answer as example

Hello,
Here is how you enter it.
[+/-]0.693/8x4[2ndF][e^x][=] result is 0.7071588193 or as you wrote 0.7071
some calculators show an error message if you enter the [+/-] (the negative of a number before the number itself).
In that case enter 0.693 then press [+/-]. the calculator should put a small - sign before the 0.
You can try
0.693[+/-][x]4[/]8[2ndF][e^x][=]

Hope it clarifies things.

SOURCE: Sharp ELSIMATE EL-240SA - how do you stop this

From the manual:

SETTING THE NUMBER OF DECIMAL DIGITS
Numbers of decimal digits of calculation results can be specified by pressing [C-CE] twice, then press [C-CE]and [M+] simultaneously.
The decimal digit assignment will appear as “F” (for “floating point”), “2” or “0” on the LCD. (The default is “F”.)
Press and hold [C-CE] and [M+] until the symbol changes.