考點:冪的乘方與積的乘方,同底數(shù)冪的乘法
專題:
分析:(1)逆運用積的乘方的性質(zhì)解答即可;
(2)根據(jù)同底數(shù)冪相乘,底數(shù)不變指數(shù)相加把底數(shù)為
的冪計算,再把8
51轉(zhuǎn)化成8×8
50,然后逆運用積的乘方的性質(zhì)解答;
(3)轉(zhuǎn)化為同指數(shù)冪的乘法計算,再逆運用積的乘方的性質(zhì)解答;
(4)轉(zhuǎn)化為同指數(shù)冪的乘法計算,再逆運用積的乘方的性質(zhì)解答.
解答:解:(1)(-4)
2000×0.25
2000,
=(-4×0.25)
2000,
=(-1)
2000,
=1;
(2)8
51×(
)
20×(
)
30,
=8×8
50×(
)
50,
=8×(8×
)
50,
=8;
(3)0.25
2008×4
2009-8
100×0.5
300,
=0.25
2008×4
2008×4-2
300×0.5
300,
=4×(0.25×)
200-(2×0.5)
300,
=4-1,
=3;
(4)0.125
3×0.25
3×2
6×2
12,
=0.125
3×0.25
3×4
3×8
3,
=(0.125×0.25×4×8)
3,
=1
3,
=1.
點評:本題考查了冪的乘方的性質(zhì),積的乘方的性質(zhì),熟記性質(zhì)并靈活運用轉(zhuǎn)化成同指數(shù)冪的運算是解題的關(guān)鍵.