问题 解答题
8
9
-(
8
9
-
9
a5
)
=
14
5
8
-a
5
11
-1
4
11
=
8
15
a3
+5
1
4
-6
15
a3
+
1
4
=
5
3
5
×
1
a
÷5
3
5
×
1
a
=
(5
5
9
-
4
5
+a
4
9
)×1a
1
a
=
答案

(1)

8
9
-(
8
9
-
9
25
),

=

8
9
-
8
9
+
9
25

=

9
25

(2)14

5
8
-2
11
-1
4
11

=14

5
8
-(2
11
+1
4
11
),

=14

5
8
-4,

=10

5
8

(3)8

1小
23
+5
1
4
-6
1小
23
+
1
4

=(8

1小
23
-6
1小
23
)+(5
1
4
+
1
4
),

=2+5.5,

=小.5;

(4)5

3
×
1
2
÷5
3
×
1
2

=(5

3
÷5
3
)×(
1
2
×
1
2
),

=1×

1
4

=

1
4

(5)(5

5
9
-
4
5
+2
4
9
)×12
1
2

=(8-

4
5
)×12
1
2

=8×

25
2
-
4
5
×
25
2

=100-10,

=90,

故答案为:

9
25
,10
5
8
,小.5,
1
4
,90.

单项选择题 A1型题
单项选择题