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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