题目内容
计算下列各式的值
(1)[125
+(
)-2+(343)
]
(2)
.
(1)[125
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
(2)
| 2lg2+lg3 | ||||
1+
|
(1)原式=[(53)
+4+(73)
]0.5=(25+4+7)0.5=6
(2)原式=
=
=
=
=
=1
| 2 |
| 3 |
| 1 |
| 3 |
(2)原式=
| lg4+lg3 | ||||
1+
|
| lg12 |
| 1+lg0.6+lg2 |
| lg12 |
| 1+lg1.2 |
| lg12 |
| lg10+lg1.2 |
| lg12 |
| lg12 |
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