Приведите дроби к общему знаменателю:a) 3/7 = ?/ 14 и 1/2 = ?/14 б) 5/6 = ?/ 12 и 3/4 = ?/12 в) 2/5 = ?/15 и 7/15 =  ?/15г) 5/6 = ? и 5/8 = ?д) 7/9 = ? и 1/6 = ? е) 5/4 = ? и 3/5 = ? 

3/7=6/14 и 1/2=7/145/6=10/12 и 3/4=9/122/5=6/15 и 7/15=7/155/6=20/24 и 5/8=15/247/9=14/18 и 1/6=3/185/4=25/20 и 3/5=12/20

a) 3/7 = ?/ 14 и 1/2 = ?/143/7 = 3*2/ 14 и 1/2 = 1*7/143/7 = 6/ 14 и 1/2 = 7/14 б) 5/6 = ?/ 12 и 3/4 = ?/12 5/6 = 5*2/ 12 и 3/4 = 3*3/12 5/6 = 10/ 12 и 3/4 = 9/12 в) 2/5 = ?/15 и 7/15 =  ?/152/5 =2*3/15 и 7/15 =  1*7/152/5 = 6/15 и 7/15 =  7/15г) 5/6 = ? и 5/8 = ?5/6 = 40/48 и 5/8 =30/48д) 7/9 = ? и 1/6 = ?7/9 = 42/54 и 1/6 =9/54 е) 5/4 = ? и 3/5 = ? 5/4 = 25/20 и 3/5 = 12/20