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 Post subject: Guest55?Posted: Sat Oct 21, 2017 8:10 pm

Joined: Sat Jan 09, 2016 6:45 pm
Posts: 303
DD did the following question:

Can you find a four digit number which is reversed when multiplied by 9? ie ABCD x9 = DCBA. She worked it out to be 9801. She asked me if there was anyway to get to the middle numbers in a quicker fashion?

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 8:21 pm

Joined: Mon Feb 12, 2007 2:21 pm
Posts: 16254
Again its practice and being familiar with the properties of the 9 times table.

1 x 9 = 09
2 x 9 = 18
3 x 9 = 27

Look at the pattern in the tens and units digits ...

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 8:22 pm

Joined: Mon Jun 18, 2007 3:32 pm
Posts: 7676
Location: East Kent
I love patterns!
My maths club and I spend ages exploring them!

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 8:26 pm

Joined: Sat Jan 09, 2016 6:45 pm
Posts: 303
Maths club sounds great! Not many of those in our area.

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 8:41 pm

Joined: Mon Feb 12, 2007 2:21 pm
Posts: 16254
Maybe something to suggest at school? NRICH has plenty of material for a club. Also the Primary Maths challenge has some good [free] materials.

https://nrich.maths.org/

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 8:58 pm

Joined: Sat Jan 09, 2016 6:45 pm
Posts: 303
Thanks Guest55. School do a maths club which DD was invited too but they tend to be for Years 4/5 as they are too busy with the Sats in Year 6.

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 9:09 pm

Joined: Mon Jun 18, 2007 3:32 pm
Posts: 7676
Location: East Kent
We have maths club for children who just need a bit of a boost.We play games, do maths crosswords and solve riddles, use the iPads to play logic games and generally enjoy ourselves, while (sneakily) learning to love the subject.

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 Post subject: Re: Guest55?Posted: Sat Oct 21, 2017 9:17 pm

Joined: Sat Jan 09, 2016 6:45 pm
Posts: 303
Sounds fun yoyo123. Would have been just the tonic for me at school. Might be better at Maths if I'd had that kind of support in school.

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