fractions / decimals
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fractions / decimals
my DS2 (y6) is safely into his super selective GS but ... although he can do on sight lots of the GS stuff his Y 8 bro struggles with (algebra, area, etc) he has an absolute blind spot wrt fractions into decimals and vice versa.
He got a level 5 SATS in the informal (terminology??) ones sat in Y5 but still wants to be able to crack them. I've tried pizzas. I've tried starting from the easy ones (1/4 = .25 etc) but he just doesn't "get" it. He's truly clever (honest!) but this is a blindness I just can't crack. It's particularly bad when it's one over something where he's keen to see the interesting number bit (aargh, by which I mean the 4 in 1/4) to end up as the point bit, thereby making 1/4 equal point four.)
Of course, normally, He Knows Best, but I think even he realises that he is on shaky ground here.
Anyone got the Open Sesame for me, whether "I did this ...." or "try this website..."
Many thanks.
He got a level 5 SATS in the informal (terminology??) ones sat in Y5 but still wants to be able to crack them. I've tried pizzas. I've tried starting from the easy ones (1/4 = .25 etc) but he just doesn't "get" it. He's truly clever (honest!) but this is a blindness I just can't crack. It's particularly bad when it's one over something where he's keen to see the interesting number bit (aargh, by which I mean the 4 in 1/4) to end up as the point bit, thereby making 1/4 equal point four.)
Of course, normally, He Knows Best, but I think even he realises that he is on shaky ground here.
Anyone got the Open Sesame for me, whether "I did this ...." or "try this website..."
Many thanks.
[img]http://sl.glitter-graphics.net/pub/47/47055t4vjrz296r.gif[/img]
I think he leaps on too quickly and wrongly. So, because 1/4 = 25/100 = 25% he's too ready to think that everything is easily the percentage of what the number is. It's the shifting sands bit, the 2/3 being 66%. After a while I forget how to do the stages and am, I confess, a terrible teacher - I can "see" it, why can't he???
Can anyone suggest a good step-by-step book, a sort of CGS (or do I mean CPL???) for year 6. A sort of teacher at home thing??
Thanks, btw, for all help so far! much appreciated. it helps me think of the stages I'm not thinking of.
Can anyone suggest a good step-by-step book, a sort of CGS (or do I mean CPL???) for year 6. A sort of teacher at home thing??
Thanks, btw, for all help so far! much appreciated. it helps me think of the stages I'm not thinking of.
[img]http://sl.glitter-graphics.net/pub/47/47055t4vjrz296r.gif[/img]
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Hi Milla
Fractions should be no problem if he always remembers to divide the numerator by the denominator.
So if he can do short division he's away.
To convert 2/3 to decimal he just needs to divide 2 by 3. To convert from decimals to fractions he just needs to know his columns - 10ths, 100ths, 1000ths etc and then convert by dividing both numerator and denominator by the largest common factor, eg 0.125 = 125/1000 = 1/8
Good luck
Fractions should be no problem if he always remembers to divide the numerator by the denominator.
So if he can do short division he's away.
To convert 2/3 to decimal he just needs to divide 2 by 3. To convert from decimals to fractions he just needs to know his columns - 10ths, 100ths, 1000ths etc and then convert by dividing both numerator and denominator by the largest common factor, eg 0.125 = 125/1000 = 1/8
Good luck