2016-11-09 12:34发布
2又2分之1比6分之9
=5/2:3/2
=5:3
7.2比4分之5
=36/5:5/4
=(36/5*20):(5/4*20)
=144:25
2又2分之一=5/2
9/6=3/2
5/2:3/2=2/5×2/3=5/3(三分之五)
7.2=36/5 36/5:5/4=36/5×5/4=9
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2又2分之1比6分之9
=5/2:3/2
=5:3
7.2比4分之5
=36/5:5/4
=(36/5*20):(5/4*20)
=144:25
2又2分之一=5/2
9/6=3/2
5/2:3/2=2/5×2/3=5/3(三分之五)
7.2=36/5 36/5:5/4=36/5×5/4=9
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