问题 解答题
计算.
7
10
×
5
16
÷
21
32
15
13
÷
15
28
×
26
21
4
7
÷
8
9
÷
9
14
14
15
÷
21
20
×
9
10
答案

7
10
×
5
16
÷
21
32

=
7
10
×
5
16
×
32
21
=
1
3
15
13
÷
15
28
×
26
21

=

15
13
×
28
15
×
26
21

=

8
3

4
7
÷
8
9
÷
9
14

=

4
7
×
9
8
×
14
9

=1;

14
15
÷
21
20
×
9
10

=

14
15
×
20
21
×
9
10

=

4
5

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