题目内容
计算:
(1)﹣6+(﹣4)﹣(﹣2)
(2)
(3)
(4)
(5)
(6)
.
(1)﹣6+(﹣4)﹣(﹣2)
(2)
(3)
(4)
(5)
(6)
解:(1)原式=﹣6﹣4+2
=﹣10+2
=﹣8;
(2)原式=﹣
+
﹣
+
=﹣1+
+
=0;
(3)原式=(﹣
)×
×(﹣
)×(﹣8)
=1×(﹣1)
=﹣1;
(4)原式=
×(﹣
)×
=(﹣
)×
=
;
(5)原式=(﹣30)×(
﹣
﹣
)
=(﹣30)×(﹣
﹣
)
=(﹣30)×(﹣
﹣
)
=(﹣30)×(﹣
)
=24;
(6)原式=﹣3﹣[﹣5+(1﹣
)×(﹣
)]
=﹣3﹣[﹣5+
×(﹣
)]
=﹣3﹣[﹣5﹣
]
=﹣3+5+
=
.
=﹣10+2
=﹣8;
(2)原式=﹣
=﹣1+
=0;
(3)原式=(﹣
=1×(﹣1)
=﹣1;
(4)原式=
=(﹣
=
(5)原式=(﹣30)×(
=(﹣30)×(﹣
=(﹣30)×(﹣
=(﹣30)×(﹣
=24;
(6)原式=﹣3﹣[﹣5+(1﹣
=﹣3﹣[﹣5+
=﹣3﹣[﹣5﹣
=﹣3+5+
=
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