题目内容
计算下列各题:
(Ⅰ) (
)-2+(
)
+(
)-
-(
)-
;
(Ⅱ)
.
(Ⅰ) (
| 1 |
| 4 |
| 8 |
| 27 |
| 1 |
| 3 |
| 1 |
| 8 |
| 2 |
| 3 |
| 81 |
| 16 |
| 1 |
| 4 |
(Ⅱ)
| |||||
|
(Ⅰ) 原式=(4-1)-2+[(
)3]
+(2-3)-
-[(
)4]-
=42+
+22-(
)-1
=16+4+
-
=20.
(Ⅱ)原式=
=
=
=a
-
=a
=
.
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 1 |
| 4 |
=42+
| 2 |
| 3 |
| 3 |
| 2 |
=16+4+
| 2 |
| 3 |
| 2 |
| 3 |
=20.
(Ⅱ)原式=
| ||||
|
| ||||
|
a
| ||
a
|
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| a |
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