问题
解答题
化简或求值: (1)(
(2)计算.
|
答案
(1)(
)-27 8
-(2 3
)0.5+(0.008)-49 9
×2 3 2 25
=(
)8 27
-(2 3
)49 9
+(1 2
)1000 8
×2 3 2 25
=
-4 9
+25×7 3
=-2 25
+2=17 9 1 9
(2)lg5•lg8000+(lg2
)23 lg600-
lg0.036-1 2
lg0.11 2
=lg5(3+3lg2)+3(lg2)2 (lg6+2)-lg
×36 1000 1 10
=3lg5+3lg2(lg5+lg2) lg6+2-lg 6 100
=
.3 4
故答案为:(1)
(2)1 9
.3 4