(1)0.4 :2 5 :2.5 3 :15
(0.4:2=3:15)
(2)2分之1 :3分之1 2.7 :1.8 2 :3
(1/2:1/3=2.7:1.8)
(3) 4.5 :3.5 9分之7 :1.8 2 :3
(这里没有选项,请检查题目后追问.)
(1)0.4 :2 5 :2.5 3 :15
(0.4:2=3:15)
(2)2分之1 :3分之1 2.7 :1.8 2 :3
(1/2:1/3=2.7:1.8)
(3) 4.5 :3.5 9分之7 :1.8 2 :3
(这里没有选项,请检查题目后追问.)