Ответ:512
а) 1/8*2=2/16
3/4*4=12/16
б)1/2*3=3/6
1/3*2=2/6
в)7/15*3=21/45
9/10*2=18/20
1/20*1=1/20
2/5*4=8/20
3/4*5=15/20
1/6*5=5/30
3/10*3=30
2/3*4=8/12
7/12*1=7/12
3/16*3=9/48
2/3*16=26/48
5/12*5=25/60
7/15*4=28/60
7/15*1=7/15
3/5*3=9/15
1/4*25=25/100
9/25*4=36/100
7/20*2=14/40
7/8*5=35/40