differences in casio 991ES and 991CW calculators

[Steve Simpkin]

One pet peeve I have with the CW models is that the x10ˣ key works differently in the CW models then on *most* scientific calculators made in the past 50 years.

Try 1 ÷ 2x10³ on almost any scientific calculator (including the fx-991EX) and you will get 0.0005 (5x10⁻⁴).

On the CW models you will get an answer of 500. For the CW models you have to enter 1 ÷ (2x10³) to get 0.0005.