Question about Casio FX-115ES Scientific Calculator

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When I try to add say 44.25 and 3.50 it won't give me 7.75 it rounds up to 8. How do I get it to stop?

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You are in the Fixed decimal place mode.
To change back to a normal mode press the Shift button(top upper left bluish color) and ten the Mode button (top upper right)
You will get a list of items from 1 to 8.
press the 8 button which is normal.
It will ask which normal mode you want. The difference is how it display the output within a certain range of values.
The "1" will show an exponetial format for value beyond 2 so .005 would be 5X10-3.
I would choose mode 2 so that it will only show exponetial beyond -9

Posted on Aug 03, 2010

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Posted on Jan 02, 2017

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Identify the column that you are rounding.

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Make numbers to the right of the original column 0.

Let's round this to the nearest 10s. The number immediately to the right is 8, so we add 1 to the 10s column and make the numbers to the right zeros. I get 4,320.

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What are the RPN keystrokes for the following problem: 8%+.9(12.2-5.2)+3%


The problem as written is not well-formed. The leading "8%" does not say "8% of what", and the "+3%" is ambiguous, so I assume the problem really is (( x + 8%) + .9 ( 12.2 - 5.2 )) + 3%, where x is a number entered before.

The resulting RPN key sequence is:
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  2. 8 [%] [+] --- add the 8% to the previous value
  3. .9 [ENTER] --- push the 0.9 to the stack
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In case you actually meant ( x + 8% ) + ( .9 ( 12.2 - 5.2 ) + 3% ) - note the difference in the position of the braces:
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  2. 8 [%] [+] --- add the 8% to the previous value
  3. .9 [ENTER] --- push the 0.9 to the stack
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Note, the only difference is the reversed order of step 6 and 7.

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