题目内容
计算题:
(1)
;(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
(3)
(4)
(5)
(6)
解:(1)原式=2![]()
=![]()
=﹣2+6
=4;
(2)原式=﹣2×3×(﹣3)﹣5﹣1
=18﹣5﹣1
=12;
(3)原式=﹣![]()
=![]()
=
;
(4)原式=(
)×(﹣6)
=﹣2+8﹣1+![]()
=15+3![]()
=18
;
(5)原式=
=
×(5+4﹣8)
=
;
(6)原式=﹣9﹣[﹣
]
=﹣9﹣(﹣
)
=﹣9﹣(﹣
)
=﹣9﹣(﹣6
)
=﹣2
.
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