multiplying and dividing fractions

guestmathsprob · 2006-10-06 03:12:02

can anyone please tell me what the answer is and how to work it out thanks

a) 11 1/4 × 4 2/3 b) 9
____________ _________

15 5 1/3 × 3 3/8

Devantè · 2006-10-06 03:23:43

Well, I won't tell you the answer, but I will tell you how to multiply mixed numbers.

11 1/4 x 3 2/3 can be changed to...

45/4 x 14/3

Then we just cross multiply the fractions like we normally would.

But the question is not clear. Are you asking us to figure out 11 1/4 x 4 2/3, or to do the division sum itself and express the whole thing as a decimal.

Devantè · 2006-10-06 03:25:42

When we're done with all this, we get:

3.5 for a).

Do the same for b). I get: 0.5

You would probably know how to express those as fractions.

polylog · 2006-10-06 03:29:21

(a)

The larger fraction bars act as brackets -- you must carry out the operations on the top first.

Convert to improper fractions.

Multiply the numerators and denominators.

divide 630 and 12 by 6:

Devantè · 2006-10-06 03:30:32

Oh, and for further reference...

a) = 52.5
-----
15

b) = 9
----
18

Oh, how I wish I could use LaTeX...

Last edited by Devanté (2006-10-06 03:31:06)

polylog · 2006-10-06 03:37:26

Hi Devanté, Latex is very easy, I learned it from Dross' post in 15 minutes.

polylog · 2006-10-06 03:39:11

Well at least the basics, I know it is actually a very large language.

Devantè · 2006-10-06 03:41:36

polylog wrote:

Hi Devanté, Latex is very easy, I learned it from Dross' post in 15 minutes.

I've read it over and over and it still confuses me...

polylog · 2006-10-06 03:46:54

Well you're right some of it is confusing at first, but one can get used to it very quickly.. for example for fractions:

the "\frac" means 'make a fraction' and you give it two parameters, the numerator and denominator, and latex makes a fraction out of them. The notation is a little odd but logical!

Devantè · 2006-10-06 03:50:19

It's that easy to create a fraction?

Test:

polylog · 2006-10-06 03:59:48

Yep.

polylog · 2006-10-06 04:02:04

Just for completeness I typed up the solution to (b) as well.

John E. Franklin · 2006-10-06 17:08:44

It's really neat to press the "quote" button and examine people's LATEX!!
It's a good way to learn, this is what it looks like...

[quote=polylog]Just for completeness I typed up the solution to (b) as well. 













[/quote]

atulvek · 2006-10-06 17:39:17

gre8

Devantè · 2006-10-06 18:59:35

atulvek, that's Insomnia's trademark avatar. Get rid of it, or MathsIsFun will be forced to get rid of it himself and give you a new one.

John E. Franklin, you can just click on the latex that has been used.

If you click on that LaTeX, you can see what was used to make that. Works for all LaTeX.

John E. Franklin · 2006-10-07 03:19:16

Oh, didn't know that about the easy click on LaTeX way!!
Thanks for the info!!

Math Is Fun Forum

#1 2006-10-06 03:12:02

multiplying and dividing fractions

#2 2006-10-06 03:23:43

Re: multiplying and dividing fractions

#3 2006-10-06 03:25:42

Re: multiplying and dividing fractions

#4 2006-10-06 03:29:21

Re: multiplying and dividing fractions

#5 2006-10-06 03:30:32

Re: multiplying and dividing fractions

#6 2006-10-06 03:37:26

Re: multiplying and dividing fractions

#7 2006-10-06 03:39:11

Re: multiplying and dividing fractions

#8 2006-10-06 03:41:36

Re: multiplying and dividing fractions

#9 2006-10-06 03:46:54

Re: multiplying and dividing fractions

#10 2006-10-06 03:50:19

Re: multiplying and dividing fractions

#11 2006-10-06 03:59:48

Re: multiplying and dividing fractions

#12 2006-10-06 04:02:04

Re: multiplying and dividing fractions

#13 2006-10-06 17:08:44

Re: multiplying and dividing fractions

#14 2006-10-06 17:39:17

Re: multiplying and dividing fractions

#15 2006-10-06 18:59:35

Re: multiplying and dividing fractions

#16 2006-10-07 03:19:16

Re: multiplying and dividing fractions

Board footer