题目内容
计算下列各式的值:
(1)3
+2
(2)(
+
)-
(3)|
-
|+3
(4)
(
+
)
(5)2
-3
+(4
-5
)
(6)|-
|+
-
.
(1)3
| 5 |
| 5 |
(2)(
| 6 |
| 7 |
| 7 |
(3)|
| 3 |
| 7 |
| 3 |
(4)
| 6 |
| 6 |
| 1 | ||
|
(5)2
| 2 |
| 3 |
| 3 |
| 2 |
(6)|-
| 64 |
| 3 | -64 |
| 3 | -27 |
(1)原式=5
;
(2)原式=
+
-
=
;
(3)原式=
-
+3
=
+2
;
(4)原式=6+1=7;
(5)原式=2
-3
+4
-5
=
-3
;
(6)原式=8-4+3
=7.
| 5 |
(2)原式=
| 6 |
| 7 |
| 7 |
| 6 |
(3)原式=
| 7 |
| 3 |
| 3 |
=
| 7 |
| 3 |
(4)原式=6+1=7;
(5)原式=2
| 2 |
| 3 |
| 3 |
| 2 |
=
| 3 |
| 2 |
(6)原式=8-4+3
=7.
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