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一、在“数”中认识数1.借助旧知,数“100以内的数”师:同学们,老师这里有一些小棒,仔细观察,看看老师是怎样数的?(演示:1根1根地数,数到10根打成捆;10根10根地数,数到十打成一大捆)师:看明白了吗?老师怎么数的?先怎样数的?然后又怎样数的?生:刚才老师先1根1根地数,数到十根捆起来,又10根10根地数,数到100捆起来。师:嗯,你们观察得可真仔细!那谁能完整地说一说,10个一是多少?10个十是多少?生:10个一是十,10个十是一百。(板书:10个一是十10个十是一百)【评析】本节课是在学生已经学习
First, the number of “knowledge” in the number of 1. With the help of the old knowledge, the number of “less than 100” teacher: classmates, teachers here are some small sticks, careful observation, look at the teacher is what kind? : 1 root 1, the number of 10 hit into a bundle; 10 10, the number of ten to become a large bundle) Teacher: see understand? How the number of teachers? What kind of number? Health: Just a teacher first 1 root number, the number of ten tied up, and 10 root 10, the number of 100 tied up. Teacher: Well, you can observe carefully! Who can fully say that the number of 10? 10 10 is how many? Health: 10 one ten, ten ten one hundred. (Blackboard: 10 one ten 10 ten one hundred) [Comment] This lesson is after the students have learned