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  3. When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the

When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the

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问题 When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the reciprocal of the original number. What is the original number? ________.
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答案3000
解析 设这个数是x，将x的小数点向左移动6位，则x除以106，得到的数字是x的倒数的9倍，即x/106=9/x，得到x=3000。
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