54*56/55-27*28/27 马上要

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/15 20:28:13
54*56/55-27*28/27 马上要54*56/55-27*28/27 马上要54*56/55-27*28/27 马上要54*56/55-27*28/27 =(55-1)*56/55-28=55

54*56/55-27*28/27 马上要
54*56/55-27*28/27 马上要

54*56/55-27*28/27 马上要
54*56/55-27*28/27 
=(55-1)*56/55-28
=55*56/55-56/55-28
=56-28-1-1/55
=27-1/55
=26又55分之54

54*56/55-27*28/27
=28*(54*2/55-1)
=28*53/55
=1484/55

54*56/55-27*28/27 
=27*28(4/55-1/27)
=27*28*(27*4-55)/(27*55)
=27*28*(108-55)/(27*55)
=28*53/55
=1484/55
=26又55分之54