Math problem: An accountant found 70 20-cent bills on the bill when checking out. After checking, he got the decimal point of a sum of money wrong. How much is it actually?

Actually, it was 2.3 yuan, but it was wrongly recorded as 23 yuan, with 23-2.3=20.7 yuan.

I thought, because the decimal point was wrong, it was 20.7 yuan more. Considering that the wrongly written number should be around 20 yuan, and because the mantissa is 7, the wrongly written mantissa is 3, the wrongly written number is 23 yuan, and the correct number is 2.3. After investigation, the answer is 2.3 yuan.

20 14 Xuzhou Sanmao Mathematics

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