# KS4. Number. Time

Dealing with calculations involving time and timetable is a basic but important part of mathematics. It is something which we should develop the skills to do quickly and accurately.

Do we know the correct way to write numbers using the 12-hour system and the 24-hour system. Let’s look at a few with the teacher and then complete the below exercise:

Exercise

Let’s complete exercise 17 from page 95 of the core textbook: