Casio HS-8VER convert please from euro to GBP and vice versa

Time is not set correctly. You set the time as AM instead of PM and vice versa. Use the following manual to set time correctly.

QW-5479 (casio.com)

The current rate is about 1 Euro to 0.80 Great British Pound
The link below will load Googles Euro to GBP converter.
Google

Is it complex or matrix? You can have only one mode at a time.What kind of equations? The solve function uses real-valued equations.
Complex numbers: You can add, subtract, multiply and divide. You can convert a number from rectangular to polar forms and vice-versa; you can calculate the absolute value of a complex number, or a conjugate.
All the operations are done in the Mode CMPLX.

The F-D key converts a displayed result from fraction to decimal and vice-versa.
If in the polynomial expression a numerical coefficient is a fraction just enter it as a fraction, possibly enclosed in parentheses. If it is a decimal number just enter it as a decimal number. Converting it to a fraction is not going to generate any more precision in the result. You lose precision when you go from fraction to decimal, but you do not make a number more precise by converting it from a decimal representation to a fraction.

Sorry to disappoint you but this calculator does not do windows. The operation you require is truly basic so as to be done by hand. It will be simpler for you if you tried to understand the scientific notation.

In Run>Mat press the OPTN key, Then F6:> to move to the next page of options. You will see the ANGL tab as on the screen capture (above F5 key.


Press F5. You will see what follows.


Type in 50, press the F4 key, 25 then F4, 23 then F4. Press EXE. you get the result in decimal degrees as on the screen capture. To convert from DMS to D.D, or from D.D to DMS, vice-versa, press the F5 key

In Run>Mat press the OPTN key, Then F6:> to move to the next page of options. You will see the ANGL tab as on the screen capture (above F5 key.


Press F5. You will see what follows.


Type in 50, press the F4 key, 25 then F4, 23 then F4. Press EXE. you get the result in decimal degrees as on the screen capture. To convert from DMS to D.D, or from D.D to DMS, vice-versa, press the F5 key

Here is a screen capture from the manual.

No!! The only complex number operations you can perform are addition, subtraction, multiplication, and division and raise to an integer power with positive exponent. You can also get the Argument or the conjugate of a number, convert a complex number from rectangular to polar forms and vice versa.
As to matrices, it can only handle up to 3X3 dimension with real coefficients.

Hello,
To convert from decimal to fraction and vice versa pess the [S<->D] key. Alternatively, if one of the whole numbers (integers) has decimal mark (dot) the result will be decimal.
Hope it helps.