题目内容
计算题:(1)
(2)3+50÷22×(﹣
)﹣1
(3)
(4)
.
(2)3+50÷22×(﹣
(3)
(4)
解:(1)
,
=﹣
+
+(﹣
﹣
),
=1+(﹣
),
=﹣
;
(2)3+50÷22×(﹣
)﹣1,
=3+50×
×(﹣
)﹣1,
=3﹣
﹣1,
=﹣
;
(3)
,
=(﹣
﹣
+
)×(﹣36),
=﹣8+9﹣2,
=﹣1;
(4)
,
=﹣1+[1﹣(1﹣
)]×7,
=﹣1+
×7,
=
.
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