1988 AMC 8 第 8 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。
8.
贝蒂用计算器计算乘积 。她忘了输入小数点,计算器显示 。如果贝蒂正确输入小数点,答案应为
Betty used a calculator to find the product She forgot to enter the decimal points. The calculator showed If Betty had entered the decimal points correctly, the answer would have been
小提示:
数一数 和 共有多少位小数
Count the total number of decimal places in and
大提示:
共有 位小数,所以从 右边数五位放小数点
There are decimal places, so place the decimal point that many digits from the right of
解答:
因数 和 分别有 位和 位小数,共 位。
从 右边数 位放小数点,得到 。
所以正确答案是 B。
The factors and have and decimal places, for a total of
Placing the decimal point digits from the right of gives
Thus, the correct answer is B .
其他年份的第 8 题
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