Computer Science · Cheatsheet
Topic 2 · Computer Organisation
Chapter 1 · Number systems & conversions
📋 Reference · always available
Place value
Binary `1010` = 8+2 = 10.
Denary → binary
Divide by 2; remainders read bottom-up.
Binary → hex
Group bits in 4s from the right; each nibble is one hex digit.
Hex digits
A=10, B=11, C=12, D=13, E=14, F=15.
Fractions
Multiply by 2; carries read top-down. May repeat → inexact floats.