Question about Casio FX-115ES Scientific Calculator
Can't find the change sign or +/- key on this calculator.
Casio apparently omitted this key to facilitate its 'Natural Display' (textbook-like) entry capability. There is also no reciprocal key that returns a value with one press. You must use the x^-1 key and hit =.
Try the following:-
6+1=7. Now hit the ANS key. You can now backspace and insert the sign with the (-) key. This also works when changing from negative to positive.
A real nuisance, I agree. For many calculations I prefer my Casio fx-991d,
which must be almost 20 years old.
Posted on Jan 18, 2013
X + 1) = 7
Posted on Oct 30, 2008
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