1/7+1/11除1/77(用简便方法计算)

日期:2022-04-08 14:25:00 人气:1

1/7+1/11除1/77(用简便方法计算)

=(1/7+1/11)×77
=1/7×77+1/11×77
=11+7
=18
    A+
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