题目内容
化简求值
(1)(2
)0.5+0.1-2+(2
) -
-3π0+
;
(2)7(
)×3(
)×6×(
)×
.
(1)(2
| 7 |
| 9 |
| 10 |
| 27 |
| 2 |
| 3 |
| 37 |
| 48 |
(2)7(
| 3 | 3 |
| 3 | 24 |
| 3 |
| ||
| 4 | 3(
| |||
分析:直接根据有理数指数幂化简即可.
解答:解:(1)原式=
+
+[(
)
]-2-1+
=
+100+(
)-2+
=
+100+
+
=103
(2)原式=126×(3×
)
×3
×3
=252×3
×3
=252
|
| 1 |
| 0.12 |
| 64 |
| 27 |
| 1 |
| 3 |
| 37 |
| 48 |
=
| 5 |
| 3 |
| 4 |
| 3 |
| 37 |
| 48 |
=
| 5 |
| 3 |
| 9 |
| 16 |
| 37 |
| 48 |
=103
(2)原式=126×(3×
| 24 |
| 9 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 12 |
| 1 |
| 4 |
| 1 |
| 12 |
| 3 | 3 |
点评:此题考查了有理数指数幂的化简求值,属于基础题,但要心细.
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