Having problems with your Vacuums ?

Hi, I have a Casio fx-115s scientific calculator which I've had for around 25 years. I am unable to use the bracket function and have lost the instructions. Could you please give any advice to save me having to buy a new calculator? I'm not sure how to use the brackets, whenever I press the ( ) buttons, it shows -E- on the screen which I'm presuming is an error message. Please help.


Answers :

You should be able to use parentheses in the same order in which you would write the arithmetic expression. For example, 4*(3.5-1.5)= should give you 8. Without the parentheses, this would 12.5.

Essentially, the left parenthesis comes immediately after an arithmetic operator, and the right parenthesis must close the parenthetical expression right after a number, and an operator must follow the right parenthesis.
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Hi, I have a Casio fx-115s scientific calculator which I've had for around 25 years. I am unable to use the bracket function and have lost the instructions. Could you please give any advice to save me having to buy a new calculator? I'm not sure how to use the brackets, whenever I press the ( ) buttons, it shows -E- on the screen which I'm presuming is an error message. Please help.


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