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> (2011山东泰安,7,3分)下列运算正确的是()A.=±5B.-=1C.÷=9D.·=6-八年级数学
(2011山东泰安,7,3分)下列运算正确的是()A.=±5B.-=1C.÷=9D.·=6-八年级数学
题目简介
(2011山东泰安,7,3分)下列运算正确的是()A.=±5B.-=1C.÷=9D.·=6-八年级数学
题目详情
(2011山东泰安,7 ,3分)下列运算正确的是( )
A.
=±5
B.
-
=1
C.
÷
=9
D.
·
=6
题型:单选题
难度:偏易
来源:不详
答案
D
A.∵
=5,故此选项错误;
B.∵
-
=
,故此选项错误;
C.
÷
=3,故此选项错误;
D.∵
·
=6,故此选项正确.
故选:D.
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题目简介
(2011山东泰安,7,3分)下列运算正确的是()A.=±5B.-=1C.÷=9D.·=6-八年级数学
题目详情
答案
B.∵
C.
D.∵
故选:D.