Запишите пять дробей, равных: а)3/6 б)4/10 в)20/30 г)20/28 !

А) 3/6 = 1/2 = 6/12 = 4/8 = 5/10 = 14/28
б) 4/10 = 2/5 = 12/30 = 8/20 = 20/50
в) 20/30 = 2/3 = 8/12 = 50/75 = 40/60
г) 20/28 = 10/14 = 5/7 = 50/70 = 25/35 = 35/49

3/6=1/2,,6/12,9/18,12/24,15/30
4/10=2/5,6/15,8/20,10/25,12/30
20/30=2/3,4/6,10/15,40/60,60/90.
20/28=10/14,5/7,15/21,25/35,30/42.