Quantcast Anyone good at math? - XP Math - Forums

XP Math Home Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment PDF Version

Go Back   XP Math - Forums > Welcome > Off-Topic Discussion

Thread Tools Display Modes
Old 07-30-2007   #1
me .
Posts: n/a
Default Anyone good at math?

6/5 divided by (1/27+11/192+343/512)needs to be in fraction form
Old 07-30-2007   #2
Posts: n/a

sorry,not good at math
Old 07-30-2007   #3
Posts: n/a

first you want to simplify all of the stuff that is being added because it is in parenthesis. to do this you need to get a common denominator. looking at the prime factorization of the denominators we see that 27 has a prime factorization of 2*2*2, 192 has a prime factorization of 2*2*2*2*2*2*3, and 512 has a prime factorization of 2*2*2*2*2*2*2*2*2. therefore the common denominator should be 2*2*2*2*2*2*2*2*2*3*3*3 (13824). now we have to get the three numbers to have the same denominator so: we multiply 1/27 by 512/512 to get 512/13824we multiply 11/192 by 72/72 to get 792/13824we multiply 343/512 by 27/27 to get 9261/13824now we add the tops so 512+792+9261=10565.now we have reduced the problem to (6/5)/(10565/13824).when you divide fractions you are really just multiplying by the reciprocal. so we can say (6/5) times (13824/10565). you multiply across to get 82944/52825which in decimal form is roughly 1.570

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 03:36 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XP Math