下列各题中,哪两个比能组成比例?把组成的比例写在括号里.(1)0.4 :2 5 :2.5 3 :15 ( )(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( )(3) 4.5 :3.5 9分之7 :1.8 2 :3 ( )
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![下列各题中,哪两个比能组成比例?把组成的比例写在括号里.(1)0.4 :2 5 :2.5 3 :15 ( )(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( )(3) 4.5 :3.5 9分之7 :1.8 2 :3 ( )](/uploads/image/z/7097429-29-9.jpg?t=%E4%B8%8B%E5%88%97%E5%90%84%E9%A2%98%E4%B8%AD%2C%E5%93%AA%E4%B8%A4%E4%B8%AA%E6%AF%94%E8%83%BD%E7%BB%84%E6%88%90%E6%AF%94%E4%BE%8B%3F%E6%8A%8A%E7%BB%84%E6%88%90%E7%9A%84%E6%AF%94%E4%BE%8B%E5%86%99%E5%9C%A8%E6%8B%AC%E5%8F%B7%E9%87%8C.%EF%BC%881%EF%BC%890.4+%EF%BC%9A2+5+%EF%BC%9A2.5+3+%EF%BC%9A15+%EF%BC%88+%EF%BC%89%EF%BC%882%EF%BC%892%E5%88%86%E4%B9%8B1+%EF%BC%9A3%E5%88%86%E4%B9%8B1+2.7+%EF%BC%9A1.8+2+%EF%BC%9A3+%EF%BC%88+%EF%BC%89%283%29+4.5+%3A3.5+9%E5%88%86%E4%B9%8B7+%EF%BC%9A1.8+2+%EF%BC%9A3+%EF%BC%88%E3%80%80%E3%80%80%E3%80%80%E3%80%80%E3%80%80%E3%80%80%E3%80%80%EF%BC%89)
下列各题中,哪两个比能组成比例?把组成的比例写在括号里.(1)0.4 :2 5 :2.5 3 :15 ( )(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( )(3) 4.5 :3.5 9分之7 :1.8 2 :3 ( )
下列各题中,哪两个比能组成比例?把组成的比例写在括号里.
(1)0.4 :2 5 :2.5 3 :15 ( )
(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( )
(3) 4.5 :3.5 9分之7 :1.8 2 :3 ( )
下列各题中,哪两个比能组成比例?把组成的比例写在括号里.(1)0.4 :2 5 :2.5 3 :15 ( )(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( )(3) 4.5 :3.5 9分之7 :1.8 2 :3 ( )
(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 0.4 :2 ( 0.4 :2 : 0.4 :2 )
(2)2分之1 :3分之1 2.7 :1.8 2 :3 ( 2分之1 :3分之1 2.7 :1.8 )
(3) 4.5 : 3.5 9分之7 :1.8 2 :3 ( 无 )