Можно номер 2 (4,8,11)
4/9*18=(4*18)/(9*1)=8 2 3/8 + 4 1/6= 6 + (9+4)/24= 6 13/24 8 3/4 * 1 3/14 = (35*17)/(4*14)= 85/8=10 5/8