题目内容
计算:(1)
;
(2)23÷[(﹣3)3﹣(﹣4)];
(3)
;
(4)﹣14﹣(1﹣0.5)×
×[2﹣(﹣3)2].
(2)23÷[(﹣3)3﹣(﹣4)];
(3)
(4)﹣14﹣(1﹣0.5)×
解:(1)
=
=﹣1+1
=0.
(2)23÷[(﹣3)3﹣(﹣4)]
=23÷(﹣27+4)
=23÷(﹣23)
=﹣1.
(3)
=
=﹣40+5+4
=﹣31.
(4)﹣14﹣(1﹣0.5)×
×[2﹣(﹣3)2]
=
=
=
.
=
=﹣1+1
=0.
(2)23÷[(﹣3)3﹣(﹣4)]
=23÷(﹣27+4)
=23÷(﹣23)
=﹣1.
(3)
=
=﹣40+5+4
=﹣31.
(4)﹣14﹣(1﹣0.5)×
=
=
=
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