题目内容
化简或求值:
(1)(
)-
-(
)0.5+(0.008)-
×
(2)计算.
.
(1)(
| 27 |
| 8 |
| 2 |
| 3 |
| 49 |
| 9 |
| 2 |
| 3 |
| 2 |
| 25 |
(2)计算.
lg5•lg8000+(lg2
| ||||
lg600-
|
(1)(
)-
-(
)0.5+(0.008)-
×
=(
)
-(
)
+(
)
×
=
-
+25×
=-
+2=
(2)
=
=
=
.
故答案为:(1)
(2)
.
| 27 |
| 8 |
| 2 |
| 3 |
| 49 |
| 9 |
| 2 |
| 3 |
| 2 |
| 25 |
=(
| 8 |
| 27 |
| 2 |
| 3 |
| 49 |
| 9 |
| 1 |
| 2 |
| 1000 |
| 8 |
| 2 |
| 3 |
| 2 |
| 25 |
=
| 4 |
| 9 |
| 7 |
| 3 |
| 2 |
| 25 |
| 17 |
| 9 |
| 1 |
| 9 |
(2)
lg5•lg8000+(lg2
| ||||
lg600-
|
=
| lg5(3+3lg2)+3(lg2)2 | ||||||
(lg6+2)-lg
|
=
| 3lg5+3lg2(lg5+lg2) | ||
lg6+2-lg
|
=
| 3 |
| 4 |
故答案为:(1)
| 1 |
| 9 |
| 3 |
| 4 |
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