Converting Between Denary & Hexadecimal Flashcards

All 6 cards in this deck

What is hexadecimal?

A base 16 number system using the digits 0–9 and the letters A–F.

What denary values do the hex digits A and F represent?

A = 10 and F = 15.

What is the largest denary number that can be written as a 2-digit hexadecimal number?

255, written as FF.

True or false? Hexadecimal is used because it is shorter and easier for people to read and remember than binary.

True. Two hex digits replace eight binary digits.

What are the steps to convert a denary number to 2-digit hexadecimal?
e.g. convert 60

1. Divide by 16: $60 \div 16 = 3$ remainder 12.
2. The whole number is the first hex digit: 3.
3. The remainder as a hex digit is the second: 12 = C, giving 3C.

What are the steps to convert a 2-digit hexadecimal number to denary?
e.g. convert 2A

1. Multiply the first digit by 16: $2 \times 16 = 32$.
2. Find the value of the second digit: A = 10.
3. Add them: $32 + 10 = 42$.