问题 解答题
4
7
×[15×(
1
3
-
3
10
)+
7
8
]
=
18÷
6
7
-(
1
4
+
2
7
9
11
=
(1+
5
7
+
1
2
÷
3
4
2
7
=
(
3
50
×101-
3
50
)÷(150+30÷
1
15
)
=
3
4
÷[(
1
16
+
1
20
)×(1÷
3
20
)]
=
1
5
÷
2
3
×
5
24
÷
7
12
=
答案

(1)

4
7
×[15×(
1
3
-
3
10
)+
7
8
],

=

4
7
×[15×
1
30
+
7
8
],

=

4
7
×[
1
2
+
7
8
],

=

4
7
×
11
8

=

11
14

(2)18÷

6
7
-(
1
4
+
2
7
9
11

=18÷

6
7
-
15
28
×
9
11

=21-

135
308

=20

173
308

(3)(1+

5
7
+
1
2
÷
3
4
2
7

=(1+

5
7
+
2
3
)×
2
7

=

50
21
×
2
7

=

100
147

(4)(

3
50
×101-
3
50
)÷(150+30÷
1
15
),

=(101-1)×

3
50
÷(150+450),

=6+600,

=606;

(5)

3
4
÷[(
1
16
+
1
20
)×(1÷
3
20
)],

=

3
4
÷[
9
80
×
20
3
],

=

3
4
÷
3
4

=1;

(6)

1
5
÷
2
3
×
5
24
÷
7
12

=

3
10
×
5
24
÷
7
12

=

1
16
÷
7
12

=

3
28

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