问题 解答题
计算题.
12-
3
5
÷
2
3

12÷(
3
5
+
2
3

12÷[
3
5
×
4
3
-1
)].
答案

(1)12-

3
5
÷
2
3

=12-

3
5
×
3
2

=12-

9
10

=11

1
10

(2)12÷(

3
5
+
2
3
),

=12÷

19
15

=12×

15
19

=

180
19

(3)12÷[

3
5
×(
4
3
-1
)],

=12÷[

3
5
×
1
3
],

=12÷

1
5

=12×5,

=60.

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