А)1:3/8=1*8/3=8/3
Б)5/12:17/18=5/12*18/17=15/34
В)3/4:5/18=3/4*18/5=27/10
Г)1 2/3:1 1/3=1 2/3*1 3/1=5/4
Д)4/9:11/9=4/9*9/11=4/11
Е)2 5/8:3 1/6=21/19
З)3 1/2:3,6=3 1/2*3 1/6=8/19
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А)1:3/8=1*8/3=8/3
Б)5/12:17/18=5/12*18/17=15/34
В)3/4:5/18=3/4*18/5=27/10
Г)1 2/3:1 1/3=1 2/3*1 3/1=5/4
Д)4/9:11/9=4/9*9/11=4/11
Е)2 5/8:3 1/6=21/19
З)3 1/2:3,6=3 1/2*3 1/6=8/19