问题
解答题
计算(1)
|
答案
(1)
-tan60°+(-2)2 1
-3 2
=2-
+3
+3 2
=2+
;2
(2)
-10
-40 90
=
-210
-310 10
=-4
.10
计算(1)
|
(1)
-tan60°+(-2)2 1
-3 2
=2-
+3
+3 2
=2+
;2
(2)
-10
-40 90
=
-210
-310 10
=-4
.10