Is this really year 8 maths?

I think this looks complex but is understanding the basics of multiplying/dividing by powers so is suitable for year 8.

anything to the power of something when multiplied can be added together
E.g r2 x r6 = r2+6= r8

similarly with division, they can be taken away

as the sum isn’t complicated with brackets or addition/subtraction, just need to simplify the fraction

24r20/30r8 = 4r^12/5

and for the second question, it’s again recognising that to go from 2 to the power of 14 to 15, just need to multiply the given number (16,384) by 2

not sure if you wanted explanation or just to ask whether I agree it’s suitable for year 8 or not but there it is in case it helps!

It will look hard/ complicated to you as an adult if you haven't done maths since school and can't remember.

For your daughter who has been doing maths regularly since reception class, and will have had several lessons covering this topic, it shouldn't be too hard.

My son is Y8 second set maths and could do that. Second question is just times the number given by 2, first question involves a bit of multiplying and cancelling out 24r20/30r8 =4r12/5 (sorry can’t format powers)

The right question is really si.ple.

The left a little more difficult but should be able to simplify a little even if not completely

Urgh. Surds?

I have an a level in Maths and still can't do these type of questions without a calculator/fingers/google/wine.

But yes, very normal for y8.

I was in top set maths in Year 8 in 2008. Tbf, I only got a C in maths, no idea why they never moved me down. Hated it. Loathed it. I wouldn't know what to do here. I can't simplify fractions either. I'll be no help to DD when the time comes, she's on her own.

give up.

MN formatting strikes again.

I am trying to write r ^ 20 or etc . Can't be bothered to rewrite.

2 15 = 2 x 2 14

They are practicing powers of.

My poor at maths DD would have been able to do this when taught in y8.

215 is 2 x 214. So if you know what 214 is you x 2 to get 215.

r^20 means r x r x r .... 20 times

She knows how to simplify fractions, so she can simplify that one.

eg 30/45 divide top and bottom by 5 gives 6/9, divide top and bottom by 3 gives 2/3

So with your one, divide top and bottom by r2 (leaves r18 on the top), then top and bottom by r6 leaves t12 on the top, then deal with the numbers.

If in doubt expand it all out so r x r x r ..... top and bottom and then cancel them off.

My daughter is y8 at a comp which does not set for maths until GCSE.
I think those are pretty typical of stuff she gets asked. I would say the one on the left is maybe a little more stretching y8s, but yes the sort of thing my daughter would do for homework. The one on the right is very easy! She just needs to be able to know what she does to calculate 2 squared, then 2 cubed etc and then she'll know what she needs to do to the 16000.

Maths teacher. Perfectly reasonable year 8 question. Really not that tricky. Can help if you like? Is it Sparx?