问题 解答题
计算:
2
5
×
6
11
+40%×
5
11
5
6
÷(1-
9
20
)×
1
5
9
16
÷(
3
8
+
1
16
答案

(1)

2
5
×
6
11
+40%×
5
11

=(

2
5
+40%)×
5
11

=

4
5
×
5
11

=

4
11

(2)

5
6
÷(1-
9
20
)×
1
5

=

5
6
÷
11
20
×
1
5

=

5
6
×
20
11
×
1
5

=

10
33

(3)

9
16
÷(
3
8
+
1
16
),

=

9
16
÷
7
16

=

9
16
×
16
7

=

9
7

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