[andrewb]

When it comes to calculators don't get me wrong, it's not a case of "I don't know 7x7 i'll use my calculator"

We only use them in complex questions which can't be worked out in your head and would take a lot of time to work out on paper. Time is valuable and some things are worth putting in a calculator, so you can learn other things on the sylabus. It makes sense to not waste time on overly complex math when you can use a calculator, but with simple maths you should always use your head to exercise your brain. We were always told this and the teacher would try and make sure it happened.