Вычислите
6 / 1 1/2
1 3/4 / 10 1/2
5 1/5 / 13/15

6:1 1/2=6:3/2=6*2/3=8/3=2 2/31 3/4 : 10 1/2=7/4 :21/2=7/4*2/21=7*2/4*21=1/2*3=1/65 1/5 :1 3/15=26/5:18/15= 26/5*15/18=13*3/9=39/9=4 1/3