问题 解答题
1
8
×
7
11
+
4
11
÷8
2
3
÷[
9
14
×(
5
6
-
4
9
)]
1
4
÷8×
8
9
÷
8
9
18
7
-
1
2
÷
3
4
-
1
3
答案

(1)

1
8
×
7
11
+
4
11
÷8,

=

1
8
×
7
11
+
4
11
×
1
8

=

1
8
×(
7
11
+
4
11
),

=

1
8
×1,

=

1
8

(2)

2
3
÷[
9
14
×(
5
6
-
4
9
)],

=

2
3
÷[
9
14
×
7
18
],

=

2
3
÷
1
4

=

8
3

(3)

1
4
÷8×
8
9
÷
8
9

=

1
4
×
1
8
×
8
9
×
9
8

=(

1
4
×
1
8
)×(
8
9
×
9
8
),

=

1
32
×1,

=

1
32

(4)

18
7
-
1
2
÷
3
4
-
1
3

=

18
7
-
2
3
-
1
3

=

18
7
-(
2
3
+
1
3
),

=

18
7
-1,

=

11
7

问答题
问答题