题目内容
(1)化简(a
b
)(-3a
b
)÷(
a
b
)
(2)计算(2
)0.5+0.1-2+(2
) -
-3π0+9-0.5+490.5×2-4.
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 5 |
| 6 |
(2)计算(2
| 7 |
| 9 |
| 10 |
| 27 |
| 2 |
| 3 |
分析:利用指数幂的运算性质即可得出.
解答:解:(1)原式=-3÷(
)•a
+
-
•b
+
-
=-9a.
(2)原式=[(
)2]
+(10-1)-2+[(
)-3]-
-3+(32)-0.5+(72)0.5×
=
+100+(
)2-3+
+
=100.
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
(2)原式=[(
| 5 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 24 |
=
| 5 |
| 3 |
| 3 |
| 4 |
| 1 |
| 3 |
| 7 |
| 16 |
=100.
点评:熟练掌握指数幂的运算性质是解题的关键.
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