问题 解答题
(1)
12
÷
24

(2)
1
2
4a3
+6a
a
9

(3)|3-
12
|+8cos230°-4tan60°
答案

(1)原式=

12÷24
=
1
2
=
2
2

(2)原式=a

a
+2a
a
=3a
a

(3)原式=|3-2

3
|+8×(
3
2
2-4×
3
=2
3
-3+6-4
3
=3-2
3

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