Математика
6 класс
я это не могу понять

1) 2/5:1/3 = 2/5•3/1 = 6/5 = 6:5  

2) 4/7:1/2 = 4/7•2/1 = 8/7 = 8:7  

3) 5/6:3/8 = 5/6•8/3 = 40/18 = 20/9 = 20:9  

4) 3 1/9:2 1/6 = 28/9:13/6 = 28/9•6/13 = 168/117 = 168:117  

5) 1 5/12:2/15 = 17/12:2/15 = 17/12•15/2 = 255/24 = 255:24  

6) 1/8:1 7/12 = 1/8:19/12 = 1/8•12/19 = 12/152 = 3/38 = 3:38