问题
选择题
我国古代数学家祖冲之在公元五世纪就算得π的近似值在3.1415926和3.1415927间,以下关于用四舍五入法得到的π的近似值的说法中,其中正确的表述是[ ]
A.它精确到千分位的值是3.141
B.它的近似值3.14精确到十分位
C.它的近似值3.1416有4个有效数字
D.它保留3个有效数字的近似值为3.14
答案
答案:D
我国古代数学家祖冲之在公元五世纪就算得π的近似值在3.1415926和3.1415927间,以下关于用四舍五入法得到的π的近似值的说法中,其中正确的表述是[ ]
A.它精确到千分位的值是3.141
B.它的近似值3.14精确到十分位
C.它的近似值3.1416有4个有效数字
D.它保留3个有效数字的近似值为3.14
答案:D
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