教学片断师:(课件出示超市商品及其价格,让学生观察这些价格有什么特点,并根据学生的回答揭示“小数“”小数点”的概念后)你们还在哪里见过小数?在书上;在菜场的电子秤上;在计算机上……学生异常活跃,教室里十分热闹。师:你们在电视上看到过小数吗?(播放录像:一名歌手在参加歌 Teaching pieces: (Courseware show supermarket goods and prices, so that students observe the characteristics of these prices, and according to the students’ answers to reveal the concept of “decimals” “decimal point”) Where have you seen decimals? In the book; On the electronic scales in the farms; on the computer ... students are unusually active, the classroom is very lively. Teacher: Did you see the decimal on TV? (Play Video: A singer is attending a song