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> 估算的值,在()A.在与之间B.在与之间C.在与之间D.在与之间-九年级数学
估算的值,在()A.在与之间B.在与之间C.在与之间D.在与之间-九年级数学
题目简介
估算的值,在()A.在与之间B.在与之间C.在与之间D.在与之间-九年级数学
题目详情
估算
的值,在( )
A.在
与
之间
B.在
与
之间
C.在
与
之间
D.在
与
之间
题型:单选题
难度:偏易
来源:不详
答案
A
分析:应先找到所求的无理数在哪两个和它接近的整数之间,然后判断出所求的无理数的范围,由此即可判定选择项.
解:∵4<
<5,
∴1<
-3<2,
∴
-3的值应在1到2之间.
故选A.
点评:此题主要考查了无理数的估算,现实生活中经常需要估算,估算应是我们具备的数学能力,“夹逼法”是估算的一般方法,也是常用方法.
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题目简介
估算的值,在()A.在与之间B.在与之间C.在与之间D.在与之间-九年级数学
题目详情
答案
解:∵4<
∴1<
∴
故选A.
点评:此题主要考查了无理数的估算,现实生活中经常需要估算,估算应是我们具备的数学能力,“夹逼法”是估算的一般方法,也是常用方法.