题目内容
化简求值:
(1)
+
+0.027-
×(-
)-2;
(2)
.
(1)
6
|
| 3 | 82 |
| 2 |
| 3 |
| 1 |
| 3 |
(2)
| lg8+lg125-lg2-lg5 | ||
lg
|
(1)∵
+
+0.027-
×(-
)-2
=
+4+100
=
.(5分)
(2)∵
=
=
=-4.(5分)
6
|
| 3 | 82 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 5 |
| 2 |
=
| 213 |
| 2 |
(2)∵
| lg8+lg125-lg2-lg5 | ||
lg
|
=
| lg1000-lg10 | ||
|
=
| 3-1 | ||
|
=-4.(5分)
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