问题 解答题
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(1)
4
3
×
2
7
+
5
7
÷
3
4

(2)
1
2
-
4
25
÷
2
5
+
1
4

(3)
1
4
÷(
5
8
+
3
8
×
8
5

(4)(9×
2
3
-4)÷
4
5

(5)[(4+
3
2
)÷
2
5
5
12

(6)
3
11
÷[
2
5
+(1-
10
11
)].
答案

(1)

4
3
×
2
7
+
5
7
÷
3
4

=

4
3
×
2
7
+
5
7
×
4
3

=(

2
7
+
5
7
)×
4
3

=1×

4
3

=

4
3

(2)

1
2
-
4
25
÷
2
5
+
1
4

=

1
2
-
2
5
+
1
4

=

1
10
+
1
4

=

7
20

(3)

1
4
÷(
5
8
+
3
8
×
8
5
),

=

1
4
÷(
5
8
+
3
5
),

=

1
4
÷
49
40

=

10
49

(4)(9×

2
3
-4)÷
4
5

=(6-4)÷

4
5

=2÷

4
5

=

5
2

(5)[(4+

3
2
)÷
2
5
5
12

=[

11
2
÷
2
5
5
12

=

55
4
×
5
12

=

275
48

(6)

3
11
÷[
2
5
+(1-
10
11
)],

=

3
11
÷[
2
5
+
1
11
],

=

3
11
÷
27
55

=

5
9

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