题目内容
(1)计算:3
+
-4
;
(2)计算:
-2cos45°+(7-
)0-(
)-1.
18 |
1 |
5 |
50 |
|
(2)计算:
8 |
π |
2 |
1 |
2 |
(1)原式=9
+
-2
=8
;
(2)原式=2
-2×
+1-2=2
-
+1-2=
-1.
2 |
2 |
2 |
2 |
(2)原式=2
2 |
| ||
2 |
2 |
2 |
2 |
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题目内容
18 |
1 |
5 |
50 |
|
8 |
π |
2 |
1 |
2 |
2 |
2 |
2 |
2 |
2 |
| ||
2 |
2 |
2 |
2 |