问题 解答题
11-3
7
11
-(1
4
11
×
8
15
+1
4
11
×
7
15
)
答案

11-3

7
11
-(1
4
11
×
8
15
+1
4
11
×
7
15
).

=11-3

7
11
-1
4
11
×(
8
15
+
7
15

=11-3

7
11
-1
4
11
×1

=11-(3

7
11
+1
4
11

=11-5

=6.

单项选择题
单项选择题