- A hand.
Here are Tara's Three Rules for counting in binary on your hands.
1. When a finger is down, that is '0'.
2. When a finger is up, that is '1.'
3. Do not count your thumb.
In this picture, all fingers are down. So this means zero.
You maybe wondering why the thumb is out.
The answer is that it does not matter where the thumb is. I do not count the thumb when counting in binary. When we get to number 10, you will see why I leave the thumb out.
Let us add 1.
Step 1: One
Put the index finger up.
1 finger is up, so this is the binary number 1.
Step 2: 10
This makes the number 10.
This number is why I leave my thumb out when counting in binary. I started doing that when a teacher thought I was flicking her off. She was not impressed when I said, "I am not flicking you off, I am counting in binary.
Step 3: 11
You get the number 11.
Step 4: 100
Step 5: 101
Step 6: 110
Step 7: 111
Step 8: 1000 Through 1111
If you can, congratulations! You have learned to count up in binary!