育民小学各年级戴近视镜的同学人数如下图．四年级戴近视镜的有多少人？哪个年级戴近视镜的人数最多？
把假分数化成带分数或整数．，，．
将假分数化成带分数或整数，把带分数化成假分数．= = = == = = 6=
把下列的假分数化成带分数或整数． = = =
把下列假分数化成带分数，把带分数化成假分数． = 3= 2= =
，
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= 
= 
= 
=
= 
= 
= 6=
= 
= 
=
= 3
= 2
= 
=
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