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教材通用教材四册P.70例1、例2。教学过程一、看图编题,引进新课。先挂出一幅彩色图,轮廓如下: 师:这是一幅同学们在公园里活动的图片,请大家根据图中条件,编一道用加、减、乘、除法计算的一步应用题。先由一个同学编,再由一个同学解答。学生自编自解情况如下: 生:公园里有12个同学在做游戏,3个同学在骑自行车,参加这两项活动的共多少人? 生:12+3=15,参加这项活动的共15人。生:公园里有3个同学在骑自行车,参加游戏的人数是骑自行车的4倍。参加游戏的是多少人?
Teaching materials common textbook four P.70 cases 1, Example 2. Teaching process A look at picture compilation, the introduction of a new lesson. The first to hang out a color map, the outline is as follows: Teacher: This is a picture of students in the park activities, please according to the conditions of the picture, make a plus, subtract, multiply, divide calculation application step. First by a classmate, then a classmate answer. Students self-solve situation is as follows: Health: 12 students in the park in the game, 3 students in cycling, the total number of participation in these two activities Health: 12 +3 = 15, to participate in this activity A total of 15 people. Students: There are 3 classmates riding bicycles in the park. The number of people participating in the games is 4 times that of riding bicycles. How many people participate in the game?