Learn how to convert numbers between Decimal, Binary, Hexadecimal, and Octal on the Casio FX-991EX Classwiz calculator. Master the art of adding base 5 numbers and understand the process of adding in base 5. This guide provides comprehensive instructions to help you navigate through the calculator's functions and make conversions effortlessly. Whether you're a student, professional, or just curious about different number bases, this is the perfect resource for you.