*10^x hiccup on Casio fx991CW Classwiz

08172023, 11:33 PM
(This post was last modified: 08182023 01:08 AM by Matt Agajanian.)
Post: #1




*10^x hiccup on Casio fx991CW Classwiz
Hi all.
From one of my latest posts on the Casio Calculator Collector Facebook group, there is a peculiar glitch with the x10^x button. The *10^x portion of the typed in value is not connected to its mantissa. This glitch is evident when a division is part of the mathematical expression input. For example, take 5/8*10^6. Rather than the expected result of 6.25*10^7, the result on the 991CW returns 6.25*10^5. Then, as I enter the expression using the x10^x button with parentheses around the 8*10^6 value, such as 5/(8x10^6), the correct answer of 6.25*10^5 is displayed. 

08182023, 03:41 AM
Post: #2




RE: *10^x hiccup on Casio fx991CW Classwiz
Answer is correct if you use the fraction display entry mode…


08182023, 04:08 AM
(This post was last modified: 08182023 04:12 AM by Matt Agajanian.)
Post: #3




RE: *10^x hiccup on Casio fx991CW Classwiz  
08182023, 10:51 AM
(This post was last modified: 08182023 02:29 PM by Albert Chan.)
Post: #4




RE: *10^x hiccup on Casio fx991CW Classwiz
Technically, [×10^] is the old [EXP] key
A [×10^] B == (A×10^B) // note the parentheses. But, I am wondering if "hiccup" is intentional: a feature, not a bug. In line mode: 5 [÷] 8 [×10^] 6 is displayed as 5÷8×10^6 5 [÷] 8 [×] [10^] 6 is displayed as 5÷8×10^(6 Based on displayed line, only difference is the extra "(". It may be more natural to assume both are equivalent. 

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