Slide the decimal button to the aproriate position.

Casio 12-digit... | Answered on Dec 11, 2015

Whats the point of the % button then?

Casio Office... | Answered 2 days ago

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Casio Office... | Answered on Apr 16, 2019

the function buttons are labeled + and -

to add put in the number then press the + button then put in the next number and + and son for all the numbers you are adding up

to subtract put in a number then press the- button ,then put in the next number and press the - button and so on

to do a combination calculation put in a number then press the + button and so on until you come to a number that you want to subtract in which case you put in that number then press the - button and if the next number is to be added ,put the number in and press the + button

to add put in the number then press the + button then put in the next number and + and son for all the numbers you are adding up

to subtract put in a number then press the- button ,then put in the next number and press the - button and so on

to do a combination calculation put in a number then press the + button and so on until you come to a number that you want to subtract in which case you put in that number then press the - button and if the next number is to be added ,put the number in and press the + button

Casio Office... | Answered on Apr 15, 2019

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Seems to be a common problem on this otherwise great calculator that helped me through both high school and university. I've had mine for nearly 20 years and this problem showed up a few years ago. But I remember classmates reported the same problem when it was almost new.

If replacing batteries isn't helping, the problem is most likely caused by oxidation on the springs connecting the battery holder to the main PCB. The solution is as follows:

1. Remove the metal back cover (2 screws)

2. Remove the plastic back lid by removing the black screws (leave the batteries mounted) and CAREFULLY slide the back lid to the lower end (where the EXE button is located). Do not lift while sliding until the lid easily comes off.

3. On the back side of the plastic lid, very carefully bend the the two metal connectors ~1 mm on both batteryholders to increase their tension.

4. Clean the connecting pads on the PCB and the metal springs with de-oxidizer solvent.

5. Re-assemble and your 4500P calculator should be good as new.

Casio Office... | Answered on Apr 02, 2019

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Casio Office... | Answered on Mar 15, 2019

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Not helpful

Casio Office... | Answered on Mar 09, 2019

2 0 8 / square_root 3 = works on mine. Exactly what key sequence are you trying?

Casio Office... | Answered on Mar 05, 2019

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