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【案例1】北京特级教师华应龙老师来我市执教六年级的复习课时,设计了一份特殊的综合测试卷,其中的第4题是这样的:甲、乙两地相距300千米,一辆汽车从甲地开往乙地,每小时行60千米,4小时后离甲地多远?生1:这道题的算式应该是300-60×4。(其余学生纷纷点头表示赞同)生2:(迟疑地)我觉得应该是60×4。师:(一脸惊讶)奇怪!一般来说,我们在解决问题时会有不同的方法,现在怎么会有两个不同的答案呢?这到底是怎么回事?
[Case 1] Beijing special grade teacher Hua Yinglong came to our city to teach the sixth grade review class, designed a special comprehensive test volume, the fourth question is this: A, B both 300 km apart, A car from A to B, 60 kilometers per hour line, 4 hours after the distance from a? Health 1: The formula of this question should be 300-60 × 4. (The rest of the students have nodded in agreement) Health 2: (hesitantly) I think it should be 60 × 4. Teacher: (look of surprise) Strange! In general, we have different ways to solve the problem, how now there are two different answers? This in the end is how else?