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Love your site-Thanks so much.
Just a note ,however, in this video (add fractions w/ unlike denominators 2) I see 5x3 =21???  
My math skills are lacking ,but I'm pretty sure it's 15. Just thought you might like to know. Also, you need to remove an "s" after the word "need" in your section that talks about keeping this site free.Otherwise,awsome site and GREATLY needed.
July 11, 2008, 12:50 pm

what is the lowest term for 1/3 + 3/15
February 23, 2009, 8:04 pm

sum of 1/3 + 3/15
February 23, 2009, 8:05 pm

I don't understand 5x3 is 15 not 21
August 22, 2009, 11:03 pm

How many legs in total do two chickens, a duck, and a sheep have?