so when you want to find the closest number to something you find the difference between the number and the other number that you are given you could times divide add etc but you have to use the method in the right way so your trying to find 500 from 450 so you could add 50 to get their but their is another number 510 so you could easly do 510-10=500 that was my guide how to find the difference between 2 numbers
This is quite a good post, see if you can post it on the Maths blogs page. If you can’t, ask Mrs Rigby.