Help with BIDMAS

11 Plus Maths – Preparation and Information

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Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Help with BIDMAS

Post by Mumstheword »

( _ + _) x _= 11

5, 7, 11, 3, 4

Help please!!!!!
Tinkers
Posts: 7240
Joined: Mon May 16, 2011 2:05 pm
Location: Reading

Re: Help with BIDMAS

Post by Tinkers »

Are you sure that's right?

11 is prime so only has multiples of 1 and 11, since 1 isn't an option I can't see how this is right.
Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Re: Help with BIDMAS

Post by Mumstheword »

That's exactly what my daughter says! Glad it's not just us, thought we we're going mad!
Tinkers
Posts: 7240
Joined: Mon May 16, 2011 2:05 pm
Location: Reading

Re: Help with BIDMAS

Post by Tinkers »

If there was a minus sign instead of a plus in the bracket you can make it work, or if some of the numbers were negative.

You aren't going mad.
Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Re: Help with BIDMAS

Post by Mumstheword »

Thank you Tinkers! :D
Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Re: Help with BIDMAS

Post by Mumstheword »

How about this one?

_ - _+_=12

5, 7, 11, 3, 4
Tinkers
Posts: 7240
Joined: Mon May 16, 2011 2:05 pm
Location: Reading

Re: Help with BIDMAS

Post by Tinkers »

11-3+4
Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Re: Help with BIDMAS

Post by Mumstheword »

Shouldn't the addition come first therefore that would equal 3+4=7 therefore 11-7=4??
Tinkers
Posts: 7240
Joined: Mon May 16, 2011 2:05 pm
Location: Reading

Re: Help with BIDMAS

Post by Tinkers »

It would be -3+4 to give 1.

Doesn't actually matter which order -+ are done in
Mumstheword
Posts: 9
Joined: Tue Apr 29, 2014 1:07 pm

Re: Help with BIDMAS

Post by Mumstheword »

Thank you, I thought the whole idea was that Bidmas went in that order!
This is hard enough lol
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