PP-T2-DS203

[Huang Hsin-Yi]

203. 19527-!-item-!-187;#058&012646
What is the result when x is rounded to the nearest hundredth?

(1) When x is rounded to the nearest thousandth the result is 0.455.

(2) The thousandths digit of x is 5.

Ans:C

我想說它是問百位數四捨五入的結果,想說A就知道了

[amazingslim]

(1)進位到千分位=0.455
有可能是0.4545~0.4549,0.4551~0.4554
進位到百分位=0.45 or 0.46

(2)千分位為5
不知其他位，insufficient

combine(1)(2)
進位到百分位=0.46

[Huang Hsin-Yi]

原來是我想的不夠透徹
謝謝amazinglim大,你的數學真好
常常兩三句就破解,真是佩服