问题 解答题
2-(
1
10
+
3
10
)
=
(
3
4
-
3
4
×
2
5
1
5
×5
=
1
5
×
1
2
÷
1
5
×
1
2
=
(
1
4
+
5
8
)÷(1
3
4
-
7
8
)
=
1
3
÷
5
6
×
9
22
÷
5
14
=
[
3
4
÷(
4
5
+
1
4
)-
4
7
9
11
=
答案

(1)2-(

1
10
+
3
10
),

=2-

2
5

=1

3
5

(2)(

3
4
-
3
4
×
2
5
1
5
×5,

=(

3
4
-
3
10
÷
1
5
×
5,

=

9
20
÷
1
5
×5,

=

9
4
×5,

=11.25;

(3)

1
5
×
1
2
÷
1
5
×
1
2

=(

1
5
÷
1
5
)×(
1
2
×
1
2
),

=1×

1
4

=

1
4

(4)(

1
4
+
5
8
)÷(1
3
4
-
7
8
),

=

7
8
÷
7
8

=1;

(5)

1
3
÷
5
6
×
9
22
÷
5
14

=

2
5
×
9
22
÷
5
14

=

9
55
÷
5
14

=

126
275

(6)[

3
4
÷(
4
5
+
1
4
)-
4
7
9
11

=[

3
4
÷
21
20
-
4
7
9
11

=[

5
7
-
4
7
9
11

=

1
7
×
9
11

=

9
77

问答题
多项选择题