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计算-22+(-1)2-(-1)3-2012+(-)-2的正确结果是A.-7B.1C.7D...
试题详情
计算-2
2+(-1)
2-(-1)
3-2012+(-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
)
-2的正确结果是( )
A.-7
B.1
C.7
D.9
相关试题
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计算-22+(-1)2-(-1)3-2012+(-
)-2的正确结果是( )
A.-7
B.1
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D.9
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计算-22+(-1)2-(-1)3-2012+(-
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计算-22+3的结果是( )
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A.-27a7
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(2005•南充)计算(-3a2)3a的正确结果是( )
A.-27a7
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计算(-a2)3•a的正确结果是( )
A.-a7
B.a7
C.-a6
D.a6
-
(1)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMkAAAAjCAYAAAA+GS7hAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(2)有这样一道题:“计算:
的值,其中x=2012.”甲同学把“x=2012”错抄成“x=2017”,但他计算结果也是正确的.请解释这是怎么回事.
-
(2012•梓潼县一模)计算
的正确结果为( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAjCAYAAABsFtHvAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD0SURBVFhH7VeBDYQgDOxk3Yl1WIZRGKVSyKu8
QLQ1kM+XaGKMeO3doQfQwgELselHwaMnBCQf5dzJOg+OACCdK8Bzs4GcgQtll2lutP+f4fIHhtd5
OV2QOU5hOBngeZaB6zkUvCH55TDOzGuu1TQXKKafMof2Tuq5Df7EjBUng9RzG1xHcjv1VODBfZad
o8AVSz/al0qH4JE8AuEeRflh+Q/jytIAnDs+gHkqF1MnU7Hmg9QDxE5En+BOo3VPJXqn8+ix0fU3
EyrkbsyGmvKiddkMRErHS6OneZVKksvzZkC/G9mrHqSeSeu8TaCBv2SsZ6/ZAOmSuXB55obnAAAA
AElFTkSuQmCC
)
B.1
C.2
D.-
-
计算:
(1)2sin60°-3tan30°+(
)-(-1)2012
(2)有一道题:“先化简再求值:(
+
)÷
,其中x=-
”,小明做题时把“x=-
”错抄成了“x=
”,但他的计算结果也正确,请你通过计算解释这是为什么?