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 Post subject: Arithmetic calculationsPosted: Tue Nov 06, 2012 10:02 pm

Joined: Tue Nov 06, 2012 5:28 pm
Posts: 13
What is the best way to perform the following calculations? These are taken from Q68 and Q69 in book 2.

Q68: x=119/17
Q69: \$30/\$4.30

I get stuck at these kind of calculations that don't look straightforward to me..!

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 Post subject: Re: Arithmetic calculationsPosted: Thu Nov 08, 2012 4:33 am

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
for 119/17

The best way for this one is to look at multiples of 17 ...

17 * 7 = 119, so 119/17 = 7

for \$30/\$4.30

move the decimal point: 3000/430 and do the long division

430 * 6 = 2580

3000 - 2580 = 420

so the answer is 6 420/430 ... very close to 7

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