问题 解答题
(1)4÷
4
5
-
4
5
÷4
(2)1÷[(
7
12
-
1
6
)×24]
(3)6÷
2
3
+4÷
1
3

(4)
7
18
×
1
4
+
3
4
÷
18
7

(5)(
3
4
+
2
9
)÷
1
36
-11
(6)(19+
1
20
)×
1
18
答案

(1)4÷

4
5
-
4
5
÷4

=4×

5
4
-
4
5
×
1
4

=5-

1
5

=4

4
5

(2)1÷[(

7
12
-
1
6
)×24]

=1÷[

5
12
×24]

=1÷10

=

1
10

(3)6÷

2
3
+4÷
1
3

=6×

3
2
+4×
3
1

=9+12

=21;

(4)

7
18
×
1
4
+
3
4
÷
18
7

=

7
72
+
3
4
×
7
18

=

7
72
+
7
24

=

28
72

=

7
18

(5))(

3
4
+
2
9
)÷
1
36
-11

=

35
36
×36-11

=35-11

=24;

(6))(19+

1
20
)×
1
18

=19×

1
18
+
1
20
×
1
18

=1

1
18
+
1
360

=1

7
120

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