We have come across a few of these questions: Eg. a grid of 32 squares has 20 shaded. What is the percentage of shaded squares?
The answers are all very close, so guestimating isn't an option. Is the only way to do the long division of 20/32?
That would take me a few minutes to complete with a pencil, never mind my DS in an exam!
It is worth kids knowing what the equivalent percentage of common fractions (other than 1/2 and 1/4!) is:
eg 1/8 =12.5%
1/6 = 16.6%
1/3 = 33.3%
1/12 = 8.3%
Haze wrote:And this is with 10 and 11 year old childeren? I didn't touch radians until maths A level!!!
nah just messing about eating pizzas and pies at home... they know how to ask for a portion in radians... wouldn't be able to do owt else with them yet