а) 4/9 : 2 = 4/18 = 2/9б) 3/5 : 2 = 3/10в) 10/21 : 5 = 2/21г) 6/7 : 3 = 6/21 = 2/7д) 5/7 : 3 = 5/21е) 2/3 : 4 = 2/12 = 1/6ж) 9/10 : 3 = 9/30 = 3/10з) 3/7 : 2 = 3/14и) 12/17 : 6 = 12/102 = 2/17
а) 4/9 : 2 = 4/18 = 2/9
б) 3/5 : 2 = 3/10
в) 10/21 : 5 = 2/21
г) 6/7 : 3 = 6/21 = 2/7
д) 5/7 : 3 = 5/21
е) 2/3 : 4 = 2/12 = 1/6
ж) 9/10 : 3 = 9/30 = 3/10
з) 3/7 : 2 = 3/14
и) 12/17 : 6 = 12/102 = 2/17