题目内容
(1)7﹣(﹣3)+(﹣5)﹣|﹣8|
(2)(﹣
﹣
+
)×(﹣60)
(3)(﹣1)3×(﹣5)÷[﹣32+(﹣2)2]
(2)(﹣
(3)(﹣1)3×(﹣5)÷[﹣32+(﹣2)2]
解:(1)7﹣(﹣3)+(﹣5)﹣|﹣8|,
=7+3﹣5﹣8,
=10﹣5﹣8,
=5﹣8,
=﹣3;
(2)(﹣
﹣
+
)×(﹣60),
=
×(﹣60)+
×60﹣
×60,
=30+20﹣45,
=5;
(3)(﹣1)3×(﹣5)÷[﹣32+(﹣2)2],
=﹣1×(﹣5)÷(﹣9+4),
=5÷(﹣5),
=﹣1.
=7+3﹣5﹣8,
=10﹣5﹣8,
=5﹣8,
=﹣3;
(2)(﹣
=
=30+20﹣45,
=5;
(3)(﹣1)3×(﹣5)÷[﹣32+(﹣2)2],
=﹣1×(﹣5)÷(﹣9+4),
=5÷(﹣5),
=﹣1.
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