"A mobile phone has such a lot of maths on it. One of the things is that it tells the percentage of your phone battery, so then you know when to charge it up or just turn it off to save the battery.The phone also has a clock so then you know when its time to go toschool, pack up for the next class and when you should get ready toleave or other things.Another part of phone has a calculator in it. It calculates sums you find hard.A mobile phone has an alarm. It can be set to any time and it will save it if you need to use it again.When I watch a video or film on my phone it always displays the amount of viewing time left on the video so then I know if I should turn it off or keep watching until the very end."
