# Goals

- Understand why a computer uses binary number system
- Convert binary numbers to decimal numbers
- Convert decimal numbers to binary numbers

# Vocabulary

- binary
- decimal
- base
- carry over
- place values
- bit
- byte

# Introduction

First watch the following videos to understand the basic of binary number systems.

# Acvtivity

## Binary Gloves

### Making a binary glove

You need

- a white glove
- black sharpie
- red sharpie (optional)

Step 1. Using a marker, write the following numbers on the front side of your left glove starting with your thumb - 1, 2, 4, 8, 16

This side of your hand is the decimal side (numbers that we use everyday and are made up of 0,1,2,3,4,5,6,7,8, and 9s)

Step 2. Flip the glove over and write 1s on the tip of all your fingers and write 0 on knuckle Right an arrow from pinky to thumb

This side of your hand is the binary side.

### Count the numbers 0-31

Step 1. Count the number from 0 to 31 with the binary glove.

Step 2. Count the number from 0 to 31 wihtout the binary glove.

The following videos explains more.