题目内容
计算:(1)
(2)32×
(3)
﹣(﹣
)
解:
(1)原式=[
﹣(﹣
)]+[
+(﹣
)]=1+0=1;
(2)原式=9×(﹣
﹣
)=9×(﹣
)﹣9×
=﹣6﹣5=﹣11;
(3)原式=[1﹣(1﹣
)]×[2﹣9]+
=[1﹣
]×(﹣7)+
=
×(﹣7)+
=﹣
+
=0.
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题目内容
计算:(1)
(2)32×
(3)
﹣(﹣
)
解:
(1)原式=[
﹣(﹣
)]+[
+(﹣
)]=1+0=1;
(2)原式=9×(﹣
﹣
)=9×(﹣
)﹣9×
=﹣6﹣5=﹣11;
(3)原式=[1﹣(1﹣
)]×[2﹣9]+
=[1﹣
]×(﹣7)+
=
×(﹣7)+
=﹣
+
=0.