Scientific Calculator Casio Fx-991ex Classwiz With Solar Battery Non-programmable And Allowed For Ege 552 Functions Carbon Body Design - Calculators - AliExpress
Getting Started with Casio Classwiz FX-991EX FX-87DEX FX-570EX Calculator - YouTube
Negative input of frequency results in “Math Error” in classwiz calculator, but it works fine with the 95es+. Is there a setting to fix this? : r/ calculators