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 Post subject: DivisionPosted: Thu Jul 12, 2012 2:01 pm

Joined: Tue Oct 19, 2010 4:29 pm
Posts: 13
Location: London
Hi

Can somebody please explain the simplest way to divide this number .

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a) 37.50 by 25

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 Post subject: Re: DivisionPosted: Thu Jul 12, 2012 2:09 pm

Joined: Tue Oct 04, 2011 8:44 am
Posts: 1390
Share:

a) 37.50 by 25

I would turn that into

37.5 x 4 divided by 25 x 4

i.e. 150 divided by 100

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 Post subject: Re: DivisionPosted: Fri Jul 13, 2012 9:36 pm

Joined: Tue Jul 21, 2009 9:56 pm
Posts: 8228
Yes - in other words to divide by 25 you multiply by 4 and divide by 100 because 4/100 = 1/25. It's easy to multiply by 4 and it's easy to divide by 100, so this should be quicker than long division.

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 Post subject: Re: DivisionPosted: Sat Jul 14, 2012 8:27 pm

Joined: Sat Feb 13, 2010 11:02 pm
Posts: 420
AR1890 wrote:
Hi

Can somebody please explain the simplest way to divide this number .

Share:

a) 37.50 by 25

As the number is between 25 and 50, then the answer must be between 1 and 2.

37.5-25=12.5 (so that gives the 1)
12.5 is half of 25 (and the .5)

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