A) 7/12 - 5/12 = 2/12 = 1/6Б) 5/9 + 1/6 = 10/18 + 3/18 = 13/18В) 5/7 14/15 = 70/105 = 2/3Г) 10/21 : 5/6 = 10/21 6/5 = 60/105 = 4/7
A) 7/12 - 5/12 = 2/12 = 1/6
Б) 5/9 + 1/6 = 10/18 + 3/18 = 13/18
В) 5/7 14/15 = 70/105 = 2/3
Г) 10/21 : 5/6 = 10/21 6/5 = 60/105 = 4/7