Go to navigation
It is currently Tue Dec 06, 2016 4:04 pm

All times are UTC




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Use of brackets
PostPosted: Fri Oct 31, 2008 10:00 pm 
Offline

Joined: Sun Mar 16, 2008 5:15 pm
Posts: 253
Location: Birmingham
My 9 year old son has been set some maths for the half term. It involves using brackets to obtain different answers using the same set of numbers. He's struggling with them and I'm baffled!

One q is : insert as many brackets as you need to make this calc. total 100 with both calculators:-
4 + 1 x 8 + 3 - 6 x 3 x 2 - 2

Please can someone tell me what is meant by both calculators and what is the method used to solve this sort of problem? We've tried all manner of combinations and failed to reach 100.

Son says he was given this by a supply teacher on the day they broke up and was given no advice on what to do other that the acronym BIDMAS.
I'd appreciate any enlightenment please!!


Top
 Profile  
 
 Post subject: Re: Use of brackets
PostPosted: Fri Oct 31, 2008 11:43 pm 
Offline

Joined: Fri Jul 06, 2007 8:31 pm
Posts: 1192
clarendon wrote:
My 9 year old son has been set some maths for the half term. It involves using brackets to obtain different answers using the same set of numbers. He's struggling with them and I'm baffled!

One q is : insert as many brackets as you need to make this calc. total 100 with both calculators:-
4 + 1 x 8 + 3 - 6 x 3 x 2 - 2

Please can someone tell me what is meant by both calculators and what is the method used to solve this sort of problem? We've tried all manner of combinations and failed to reach 100.

Son says he was given this by a supply teacher on the day they broke up and was given no advice on what to do other that the acronym BIDMAS.
I'd appreciate any enlightenment please!!



( 4 + 1 ) x ( 8 + 3 - 6 ) x ((3 x 2) - 2)

Isn't it BODMAS but there does seem to be a http://www.mathagonyaunt.co.uk/INTERACTIVE/bidmas/equation.html

_________________
Animis opibusque parati


Top
 Profile  
 
 Post subject:
PostPosted: Sat Nov 01, 2008 8:50 am 
Offline

Joined: Mon Dec 31, 2007 1:28 am
Posts: 91
Location: Wirral
Yes it used to be BODMAS but now is BIDMAS! It stands for

Brackets
Indices
Division
Multiplication
Addition
Subtraction

meaning do anything in brackets first, then indices if there are any, etc.

No idea what 'both calculators' means though.


Top
 Profile  
 
 Post subject:
PostPosted: Sat Nov 01, 2008 12:21 pm 
Offline

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11940
Both calculators, I suspect, refers to the 'old fashioned' type that did not always get the 'right' answer because they worked from left to right rather than using BIDMAS and the newer ones that do.

It sounds like a homework that was not really thought through ..


Top
 Profile  
 
 Post subject:
PostPosted: Sat Nov 01, 2008 1:44 pm 
Offline

Joined: Sun Mar 16, 2008 5:15 pm
Posts: 253
Location: Birmingham
Thanks for the help... had no idea that "double" brackets could be used!
You're right Guest 55.. as I said the homework was given on the Fri they broke up and by a supply who didn't offer any explanation. It's from a Scholastic paper aimed at 9 - 11 yr olds.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2016