问题 解答题
计算(能简算的要简算)
34
13
-(
4
15
+
2
5
[1-(
1
4
+
3
8
)]÷
1
4
2-
3
8
÷
7
16
-
1
7
2
3
×
8
5
+
1
3
÷
5
8
答案

(1)

34
13
-(
4
15
+
2
5
),

=

34
13
-
2
3

=

76
39

(2)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
÷
1
4

=

3
2

(3)2-

3
8
÷
7
16
-
1
7

=2-

6
7
-
1
7

=2-(

6
7
+
1
7
),

=2-1,

=1;

(4)

2
3
×
8
5
+
1
3
÷
5
8

=

2
3
×
8
5
+
1
3
×
8
5

=(

2
3
+
1
3
)×
8
5

=1×

8
5

=

8
5

单项选择题
单项选择题