问题:
计算:
(1) lg700-lg56-3lg
1
2
+20(lg20-lg2)2+ 71-lo
g
27
;
(2)计算 2-(
1
2
)+
(-4)0
2
+
1
2
-1
-
(1-
5
)0
- 8
2
3
.
计算:
(1) lg700-lg56-3lg
+20(lg20-lg2)2+ 71-lo
;
(2)计算 2-(
)+
+
-
- 8
.
(1) lg700-lg56-3lg
1 |
2 |
g | 27 |
(2)计算 2-(
1 |
2 |
(-4)0 | ||
|
1 | ||
|
(1-
|
2 |
3 |
参考答案: