Before we start, we need to clear up if it's BIDMAS or BODMAS. It's clearly answered in the video and then I take some time to explain how it is used. There are lots of examples which show, not only how to use BIDMAS/BODMAS but how to use it with negative numbers. The rest of the video looks at how we can use the work from Year 7 algebra alongside the new work on negative numbers and BIDMAS. This is the beauty of mathematics! There are lots of worked examples all explained in an easy to understand way.