题目内容
计算:
(1)(
-1)0+
sin45°-22.
(2)(π-3)0+(
)-1-sin45°
(3)
-(4-π)0-6cos30°+|-2|
(4)(
)-1+
+|1-
|0-2sin60°?tan60°.
(1)(
2011 |
18 |
(2)(π-3)0+(
2 |
(3)
27 |
(4)(
1 |
2 |
8 |
2 |
(1)原式=1+3
×
-4=1+3-4=0;
(2)原式=1+
-
=1;
(3)原式=3
-1-6×
+2=3
-1-3
+2=1;
(4)原式=2+2
+1-2×
×
=2+2
+1-3=2
.
2 |
| ||
2 |
(2)原式=1+
| ||
2 |
| ||
2 |
(3)原式=3
3 |
| ||
2 |
3 |
3 |
(4)原式=2+2
2 |
| ||
2 |
3 |
2 |
2 |
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