一、试一试,提出疑惑质疑是调动学生积极思维的“催化剂”。在教学中,教师应创设机会,让学生在尝试中发现问题,激发学生强烈的好奇心和求知欲,使学生的注意、记忆、思维集中在一起,进入一种智力活动的最佳状态。如教学“分数除以整数”的例题“把4/5米平均分成2份,每份是多少米 First, give it a try, put forward doubts and doubts is to mobilize the students positive thinking “catalyst.” In teaching, teachers should create opportunities for students to discover problems in their attempts, stimulate their students 'intense curiosity and curiosity, and bring students' attention, memory and thinking together into an optimal state of intellectual activity. Example teaching “fraction divided by an integer” Example "Average 4/5 meters divided into two, how many meters each