Are Form 2220 Index 2023-2024

Hi there and welcome to another video from Hegarty maths. It's Mr. Haggerty here. This is video 22 on our GCC higher revision series. We're talking about standard form today. As always, a reminder that this video is not supposed to teach you from first principles the understanding of standard form and why it works. It's a quick summary of the key facts you need to know for the exam and then a practice of some exam questions. As always, I'm going to start off by doing some examples just to show you the basic ideas. Take notes down for that, fully concentrate, maybe even make a revision card. After that, there will be several exam questions. Pause the video when I show it to you, try it, then play and mark it. If you got 100% correct, if you're doing the course online, then if it's all right, green tick that video. If it's a bit wrong, couple of mistakes, amber. You might need to revisit those topics. And if it's red, you probably need to watch the video again and start over or ask your teacher for help. Okay, firstly, standard form. Very basically, what is it? Well, standard form is a way of writing big and small numbers. It's a way of writing them quickly and efficiently. So, it always comes up in questions to do with big or small numbers. What does a number in standard form look like? Well, it always looks like this: some number multiplied by a power of 10, 10 to some power (I'm going to put 10 to the power of n). Now, this number, what must this number be? It must be between 1 and 10. It can't be 0.5 because that's below 1. It couldn't be 12 because that's above...