问题 解答题
递等式计算(能简算的要简算)
8
17
÷9+
1
9
×
8
17

3
4
-
1
6
)×(
5
9
+
2
3

9
20
÷[
1
2
×(
2
5
+
4
5
)].
答案

(1)

8
17
÷9+
1
9
×
8
17

=

8
17
×
1
9
+
1
9
×
8
17
,.

=

8
17
×
1
9
×2,

=

16
153

(2)(

3
4
-
1
6
)×(
5
9
+
2
3
),

=(

9
12
-
2
12
)×(
5
9
+
6
9
),

=

7
12
×
11
9

=

77
108

(3)

9
20
÷[
1
2
×(
2
5
+
4
5
)],

=

9
20
÷[
1
2
×
6
5
],

=

9
20
÷
3
5

=

9
20
×
5
3

=

3
4

单项选择题 A1/A2型题
填空题