There are a few ways of learning how to calculate percentages of whole numbers .. .. although this video shows how to calculate percentages by converting to fractions and then cross division. 'Percentage' means 'out of 100.' Therefore we can use the idea of 'equivalent fractions' to make the numbers smaller and easier to deal with. So 12% is exactly the same as 12/100; … [Read more...]
Real maths – How many cars do I need to wash to buy a Nintendo DS?
Real maths ... because everything costs something! When you want a Nintendo DS, how long will it take if you earn £5 per hour? Although the video is a quite straightforward, and contains a Lol cameo, there is a serious side to the question. It was founded on the thought that most of the word questions in maths books are a little 'abstract.' My children are far more … [Read more...]
How to do Short Division or How Many Lots?
Short division for Key stage 2 … [Read more...]
How to multiply two numbers by one number
Short multiplication methods for Key Stage 2 … [Read more...]
Who invented maths?
Yeah, but who invented maths? .. was one of my favourite questions this week. I’m not sure whether the student was just a little bored and wanted a diverting chat, or whether there was a genuine interest. Either way it did get me thinking. Here’s what probably happened: A long time ago there lived a boy with an unpronounceable name. So we’ll call him Eric. He … [Read more...]