问题 解答题
计算:
28-
8
9
÷
8
11
×
9
11
1
6
×
2
3
÷(
4
5
-
8
15
)
[1-(
1
4
+
3
8
)]÷
1
4
4
7
+
1
2
)×
7
25
答案

28-
8
9
÷
8
11
×
9
11

=28-

8
9
×
11
8
×
9
11

=28-1,

=27;

1
6
×
2
3
÷(
4
5
-
8
15

=

1
9
×
15
4

=

5
12

[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
]×4,

=

3
8
×4,

=

3
2

4
7
+
1
2
)×
7
25

=

15
14
×
7
25

=

3
10

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