5th grade math
posted by Anonymous .
can you please explain &show me how to get these answers to common denominators,find the sum & difference,write in simplest form,7/103/5 =,2/31/6 =,5/67/12 =,5/12+1/4=,1/6+2/9=,5/8+1/2=,3/8+1/4= i'm really having a huge problem understanding this,it's getting late,i'm having a test tomorrow &really need to know how to do these.Thank you so much for allyour help.

You didn't bother to read and follow directions in my previous post?
http://www.jiskha.com/display.cgi?id=1298606169 
how will you get 5divided by4,820