题目内容
计算下列各题
(1)
+
+3
-
(2)|-2
|-(
)0+
(3)3
+
-4
(4)
x2=26-1.
(1)
| 16 |
| 3 | 27 |
| 3 |
| (-3)2 |
(2)|-2
| 2 |
| 1 |
| 5 |
| 2 | ||
|
(3)3
| 18 |
| 1 |
| 5 |
| 50 |
|
(4)
| 4 |
| 9 |
(1)原式=4+3+3
-3
=4+3
;
(2)原式=2
-1+
=3
-1;
(3)原式=9
+
-2
=8
;
(4)方程变形得:x2=
,
解得:x=±
.
| 3 |
=4+3
| 3 |
(2)原式=2
| 2 |
| 2 |
=3
| 2 |
(3)原式=9
| 2 |
| 2 |
| 2 |
=8
| 2 |
(4)方程变形得:x2=
| 225 |
| 4 |
解得:x=±
| 15 |
| 2 |
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