计算:(0.0081)-1/4-10×0.0271/3+lg1/4-lg25 _ .
问题描述:
计算:(0.0081)-
-10×0.0271 4
+lg1 3
-lg25 ___ .1 4
答
(0.0081)-
-10×0.0271 4
+lg1 3
-lg251 4
=
-10×1
4
0.0081
+lg(
3
0.027
÷25)1 4
=
-10×0.3+lg(0.01)1 0.3
=
-3-210 3
=-
5 3
故答案为:-
.5 3