
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
September 22nd, 2008, 10:29 AM  #1 
Member Joined: Sep 2008 Posts: 97 Thanks: 0  Multiplying 3 or more fractions..
How do you multiply three or more fractions at a time? Example: 2 1/2 x 4 x 3/5? I know that 4 becomes a reciprocal. 2 1/2 x 4/1 x 3/5? What do you do after this? 
September 22nd, 2008, 12:11 PM  #2 
Senior Member Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 2  Re: Multiplying 3 or more fractions..
Be careful with your notation there. The reciprocal of a number is 1/number. So the reciprocal of 4 is 1/4... Anyway, Make all of the numbers improper fractions: 2 1/2 x 4 x 3/5 > 5/2 x 4/1 x 3/5 Then multiply the numerators and multiply the denominators: 5*4*3 = 60 2*1*5 = 10 The product of the numerators becomes the new numerator and the product of the denominators becomes the new denominator: 60/10 Then reduce: 6 

Tags 
fractions, multiplying 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Multiplying out fractions of a quadratic  conure  Algebra  6  August 19th, 2013 02:45 AM 
Multiplying Radicals  xnarutox  Algebra  6  June 12th, 2011 03:20 PM 
Multiplying Rational Fractions  David_Lete  Algebra  1  January 27th, 2009 08:23 AM 
multiplying this equation  caligirl1997  Elementary Math  2  January 23rd, 2009 09:26 PM 
Multiplying two matrices  FoScho  Algebra  1  October 20th, 2008 12:04 PM 