你和老师比,谁高谁矮?
那你和小朋友比谁高谁矮,可以怎么比?
观察,你认为笑笑和淘气一般高吗?
比一比: 4人一小组,先两人比,两人看,告诉比的结果; 再换一人与他比,每人都要和组里另外三人比一比。
如果没有站在同一起点上,你会比较吗?
这种情况,你会比较吗?如果是这样子,你会比较吗?来自谁长?谁短?下课啦
北师大版 一年级上册 第二单元 比较
序言
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