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【片断1】整万数的基本含义师:课前,同学们已经完成了“认识整万数”的小研究。下面请大家将自己的研究成果在小组里与同学分享。学生介绍已经学过的数位和计数单位,汇报6、55、345、2200各数的组成。师:大家说得非常清楚。我们已经认识的数位有个、十、百、千、万位,这些数位上的计数单位分别是一、十、百、千、万;而且10个一是十,10个十是——
[Piece 1] The whole meaning of the whole number of teachers division: Before class, the students have completed “Know the whole number of ” small study. Now, please share your research results with your classmates in the group. Students introduce the units of counting and counting that they have learned, reporting the composition of 6,55,345,2200 each. Teacher: Everyone said very clearly. The digits we have come to know are one, ten, one hundred, one thousand, and ten thousand. The counting units in these digits are respectively one, ten, one hundred, one thousand, ten thousand; and the ten one is ten and the ten is ten -