数学老师在讲“对数表”一课时，拿出一张A4纸，告诉学生，“这张纸的厚度是0．083毫米，现在我将这张纸对折3次，厚度还不到1毫米，那么请同学们想一想，如果能够对折30次的话，它的厚度是多少呢 ”学生有的回答10厘米，有的说1米多，老师却说：“我已经计算过了，如果我没算错的话，这厚度要远远超过珠穆朗玛峰的高度。”学生们惊讶不已，甚至有人认为老师算错了，在这样的一种氛围下，教师顺势引入“对数表”的教学。在这一教学过程中，教师运用了哪些教学方法（ ）
正确答案及解析
正确答案
解析
在讲“对数表”一课时，运用的是讲授法；拿出A4纸，运用了演示法；“它的厚度会是多少呢 ”，运用了谈话法。
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