问题
解答题
(1)计算:
(2)计算:
(3)计算:2a
|
答案
(1)原式=
÷12 3
=12÷3
=2;
(2)原式=2
-23
+4-45
+33
=7-2
-23
;5
(3)原式=2ab
-3a ab 2
+ab3a 3a
=
ab5 2
.3a
(1)计算:
(2)计算:
(3)计算:2a
|
(1)原式=
÷12 3
=12÷3
=2;
(2)原式=2
-23
+4-45
+33
=7-2
-23
;5
(3)原式=2ab
-3a ab 2
+ab3a 3a
=
ab5 2
.3a