ICT

Computing

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##### Overview

##### Learning Objectives

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ID | Skill_name |
---|---|

3.3.1.1 | I can understand decimal (base 10) |

3.3.1.2 | I can understand binary (base 2) |

3.3.1.3 | I can understand hexadecimal (base 16). |

3.3.1.4 | I can understand that computers use binary to represent all data and instructions. |

Base-16 is also called hexadecimal. It's commonly used in computer programming, so it's very important to understand. Let's start with counting in hexadecimal to make sure we can apply what we've learned about other bases so far.

Since we are working with base-16, we have 16 digits. So, we have 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ... and yikes! We've run out of digits, but we still need six more. Perhaps we could use something like a circled 10?

The truth is, we could, but this would be a pain to type. Instead, we simply use letters of the alphabet, starting with A and continuing to F. Here's a table with all the digits of base-16:

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## Teacher Date: 2019-08-20

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