题目内容
计算下列各式:
(1)1﹣32﹣
×[(﹣5)2×(﹣
)﹣240÷(﹣4)×
];
(2)2×(
+
+
+
+
).
(1)1﹣32﹣
(2)2×(
解:(1)1﹣32﹣
×[(﹣5)2×(﹣
)﹣240÷(﹣4)×
]
=1﹣9﹣
×[25×(﹣
)﹣240×(﹣
)×
]
=1﹣9﹣
×(﹣15+15)
=1﹣9﹣0
=﹣8;
(2)2×(
+
+
+
+
)
=3×(
﹣
+
﹣
+
﹣
+
﹣
+
﹣
)
=3×(
﹣
)
=
.
=1﹣9﹣
=1﹣9﹣
=1﹣9﹣0
=﹣8;
(2)2×(
=3×(
=3×(
=
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