论文部分内容阅读
一次在《分数混合运算(三)》课中,我出示问题情境:小刚家九月份用水12吨,比八月份节约了17,八月份用水多少吨?我先组织学生估计八月份用水量,然后再画线段图,把八月份用水量看做单位“1”平均分成7份,九月份比八月份少画17。经过分析后学生写出了等量关系:八月份的67就是九月份的用水量。忽然,我发现班中的小明没有参与同学间的讨论,
Once in the “Fractional Computation (III)” class, I showed the question situation: Xiaogang’s home use of 12 tons of water in September saved 17 times from August’s consumption by August. I first organized students to estimate the amount of water used in August, And then draw the line segment, the water consumption in August as the unit “1 ” divided into an average of 7, less painting in September than in August 17. After analysis, students wrote the same amount of relationship: 67 in August is the amount of water consumed in September. Suddenly, I found Xiao Ming class did not participate in the discussion between classmates,