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今天学习被减数中间和末尾有零的退位减法,首先我在黑板上板书507-348,让学生独立计算,尝试完成。接着让学生上来分享他们的算法。一位同学上来边讲边用竖式说明,之后大家向她提问:“为什么十位上的数相减得5?”这位同学讲得非常好,看来让学生讲比老师讲要好。“要知道做得对不对,怎么验
Today, learning is subtracted from zero by the middle and the end of subtraction. First, I am writing on the blackboard 507-348, letting students calculate independently and try to finish. Then let the students up to share their algorithms. A classmate came up to speak with a vertical description, after which we asked her questions: ”Why the number on the top ten subtract 5? “ The classmates spoke very well, it seems to make students speak better than the teacher . ”To know that done right, how to experience