(1) 1 6 : 1 5 = 1 6 ÷ 1 5 = 5 6 ;(2)0.75:15=0.75÷15=0.05;(3)36: 2 5 =36÷ 2 5 =90; (4)15分: 1 12 时=15分:5分=15÷5=3.