1995 AMC 8 第 3 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
3.
下列哪种运算对一个数的作用，与先乘以 再除以 相同？
Which of the following operations has the same effect on a number as multiplying by and then dividing by
除以
dividing by
除以
dividing by
乘以
multiplying by
除以
dividing by
乘以
multiplying by
答案：E
小提示：
除以 等于乘以
Dividing by is the same as multiplying by
大提示：
把 合并成一个分数
Combine into a single fraction
解答：
除以 等于乘以 ，所以两个运算合起来相当于乘以
因此总效果是乘以 。
所以正确答案是 E。
Dividing by is the same as multiplying by so the two operations together multiply by
So the combined effect is multiplying by .
Thus, the correct answer is E .
其他年份的第 3 题
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