题目内容
计算下列各式的值:
(1)(
)-2+(1-
)0-(3
)
;
(2)
.
(1)(
| 2 |
| 3 |
| 2 |
| 3 |
| 8 |
| 2 |
| 3 |
(2)
| 2lg2+lg3 | ||||
1+
|
(1)原式=
+1-[
]2=
+1-
=1;
(2)原式=
=
=
=
=1.
| 9 |
| 4 |
| 3 | (
| ||
| 9 |
| 4 |
| 9 |
| 4 |
(2)原式=
| lg4+lg3 | |||||
1+lg
|
| lg12 |
| 1+lg0.6+lg2 |
| lg12 |
| lg10+lg0.6+lg2 |
| lg12 |
| lg12 |
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