Ответ:\(48 : 6 \times 9 = 8 \times 9 = 72\).\(54 : (18 - 4) = 54 : 14 = \frac{27}{7} = 3\frac{6}{7}\).\(72 : (15 - 6) = 72 : 9 = 8\).Ответ: 72; \(3\frac{6}{7}\); 8.