问题
解答题
化简下列各式: (Ⅰ)(
(Ⅱ)
|
答案
(1)(
)25 9
×(1 2
)8 125
-(1 3
)0÷[(3 3
)-27 8
+0.027-1 3
]-1 3 1 2
=
× 25 9
-1÷(3 8 125
+1 3 27 8
) -1 3 0.027 1 2
=
× 5 3
-1÷(2 5
+2 3
)-1 0.3 1 2
=
-1÷2 3
=-1 4 4 3
(2)
lg1 3
+25 9
lg2 3
+lg(45)8 1 3
=lg(
)2×10 2×3
×21 3
×3 2
×(2 3
)32×10 2 1 3
=lg(10×2-
+1-2 3
×3-1 3
+2 3
)2 3
=1