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标题: 请教思路 [打印本页]

作者: assurance    时间: 2006-3-30 07:22     标题: 请教思路

Is the hundredths digit of the decimal d greater that 5?

(1) the tenth digit of 10d is 7;

(2) the thousandths digit of d/10 is 7.

answer


作者: apply1    时间: 2006-3-30 21:04

问小数d的百分位(即小数点后第2位)是否大于5?

(1)10d的十分位是7,所以d的百分位是7,大于5

(2)d/10的千分位是7,所以d的百分位是7,大于5






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