题目内容

7
6
÷(
7
3
-
7
9
)
2
3
+
3
4
÷
7
12
7
9
÷[3-(3-1
7
10
)]
9
8
×
2
3
-
4
5
÷
8
5
7
8
-
4
9
×
3
8
5
8
×
4
5
×(
5
6
+
1
3
)
4
9
÷
3
5
+
5
9
÷
3
5
9
10
÷
3
4
+
4
3
×
1
10
(1)
7
6
÷(
7
3
-
7
9

=
7
6
÷
14
9

=
7
6
×
9
14

=
3
4


(2)(
2
3
+
3
4
÷
7
12

=
17
12
×
12
7

=
17
7


(3)
7
9
÷[3-(3-1
7
10
)]
=
7
9
÷[3-3+1
7
10
]
=
7
9
÷
17
10

=
7
9
×
10
17

=
70
153


(4)
9
8
×
2
3
-
4
5
÷
8
5

=
3
4
-
4
5
×
5
8

=
3
4
-
1
2

=
1
4


(5)
7
8
-
4
9
×
3
8

=
7
8
-
1
6

=
17
24


(6)
5
8
×
4
5
×(
5
6
+
1
3

=
1
2
×
7
6

=
7
12


(7)
4
9
÷
3
5
+
5
9
÷
3
5

=(
4
9
+
5
9
)÷
3
5

=1÷
3
5

=
5
3


(8)
9
10
÷
3
4
+
4
3
×
1
10

=
9
10
×
4
3
+
4
3
×
1
10

=(
9
10
+
1
10
)×
4
3

=1×
4
3

=
4
3
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