问题 解答题
1
4
×
3
5
÷
9
8
3
5
÷
1
20
÷
3
4
2
3
-
1
4
)÷
5
6
5
8
÷(
1
2
+
1
4
8
13
÷7+
1
7
×
6
13
1
2
-
1
8
÷
5
12
答案

(1)

1
4
×
3
5
÷
9
8

=

1
4
×
8
9
×
3
5

=

2
9
×
3
5

=

2
15

(2)

3
5
÷
1
20
÷
3
4

=12÷

3
4

=16;

(3)(

2
3
-
1
4
)÷
5
6

=

5
12
×
6
5

=

1
2

(4)

5
8
÷(
1
2
+
1
4
),

=

5
8
÷
3
4

=

5
6

(5)

8
13
÷7+
1
7
×
6
13

=

8
13
×
1
7
+
1
7
×
6
13

=(

8
13
+
6
13
)×
1
7

=

14
13
×
1
7

=

2
13

(6)

1
2
-
1
8
÷
5
12

=

1
2
-
3
10

=

1
5

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