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  • 观察循环小数化成分数的特征,用分数表示循环小数.
    (1)
    0.3
    =
    3
    9
    =
    1
    3
            0.
    ..
    16
    =
    16
    99
            6.
    0
    1
    5
    =
    15
    999
    =6
    5
    333
         0.
    1
    0
    2
    =
    102
    999
    =
    34
    333
            0.
    2
    0
    4
    =
    ( )
    ( )

    (2)0.2
    6
    =
    26-2
    90
    =
    24
    90
    =
    8
    30
    =
    4
    15
       0.35
    3
    =
    353-35
    900
    =
    318
    900
    =
    53
    150
       6.2
    ..
    81
    =6
    281-2
    990
    =2
    279
    990
    =6
    31
    110
              0.12
    3
    4
    5
    =
    ( )
    ( )
    【考点】循环小数与分数
    【分析】请登陆后查看
    【解答】请登陆后查看
    难度:中等
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