问题
解答题
计算: (1)
(2)
(3)
(4)(
|
答案
(1)原式=2×6
=2
;3
(2)原式=3
-23
+43 3
=5
;3
(3)原式=2
+22
-3 1 2
+2 1 2 3
=3 2
+2 5 2
;3
(4)原式=
÷3a
-3a 3
÷27a3 a 3
=3-27a.
计算: (1)
(2)
(3)
(4)(
|
(1)原式=2×6
=2
;3
(2)原式=3
-23
+43 3
=5
;3
(3)原式=2
+22
-3 1 2
+2 1 2 3
=3 2
+2 5 2
;3
(4)原式=
÷3a
-3a 3
÷27a3 a 3
=3-27a.