问题 解答题
脱式计算:
5
7
×
2
3
÷1
3
7

②2
4
5
÷(1+
1
5

3
11
÷(
3
4
×
3
11
④12÷(
4
7
÷
3
35
⑤14÷1
3
4
×1
3
4
5
9
×6
1
5
×1
2
7
答案

5
7
×
2
3
÷1
3
7

=

5
7
×
2
3
×
7
10

=

5
7
×
7
10
×
2
3

=

1
2
×
2
3

=

1
3

②2

4
5
÷(1+
1
5
),

=2

4
5
÷1
1
5

=

14
5
×
5
6

=

7
3

3
11
÷(
3
4
×
3
11
),

=

3
11
÷
9
44

=

4
3

④12÷(

4
7
÷
3
35
),

=12÷

20
3

=

9
5

⑤14÷1

3
4
×1
3
4

=14×

4
7
×
7
4

=14×(

4
7
×
7
4
),

=14×1,

=14;

5
9
×6
1
5
×1
2
7

=

31
9
×
9
7

=

31
7

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