简便方法计算 (27又27/55+9又9/11)除以(9又9/55+3又3/11)

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简便方法计算 (27又27/55+9又9/11)除以(9又9/55+3又3/11)

简便方法计算 (27又27/55+9又9/11)除以(9又9/55+3又3/11)
简便方法计算 (27又27/55+9又9/11)除以(9又9/55+3又3/11)

简便方法计算 (27又27/55+9又9/11)除以(9又9/55+3又3/11)
﹙27又27/55+9又9/11﹚÷﹙9又9/55+3又3/11﹚
=3×﹙9又9/55+3又3/11﹚÷﹙9又9/55+3又3/11﹚
=3