问题 解答题
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
答案

(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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