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【案例描述】【案例一】创设学钉纽扣的情境。学生用学具片代替纽扣进行操作。师:把16个纽扣平均钉在4件衣服上,你打算怎么钉?结果怎么样?(学生操作后指名回答。)师:你的想法跟他一样吗?一样的请举手。怎样用算式表示钉的结果?(个别回答,教师板书。)师:把16个纽扣平均钉在5件衣服上,你打算怎么钉?结果会怎样?请把你钉的结果告诉同桌。(学生操作后互说。)师:你的同桌是怎么说的?能告诉大家吗,(个别回答)
[Case Description] [Case 1] to create learning nail button situation. Students use the school piece instead of the button to operate. Teacher: Assign 16 buttons on 4 clothes on average, how are you going to nail? How about the result? (The student answers the name after the operation.) Teacher: Do you think like him? How do you nail the result? (Individual answers, Teacher's Book.) Teacher: Assign 16 buttons on 5 pieces of clothing on average. What do you plan to do? What will happen? Please tell us the result of your nail. (The students talk to each other after the operation) Teacher: How do you say at the same table? Can you tell me (individual answers)