问题 解答题
直接写得数.
2
5
×
4
15
=
7
10
=
4-
2
3
=
9
10
÷
3
5
=
2
3
=
19
53
×0=
5
6
=
4
5
÷8=
答案

2
5
×
4
5
=
8
25
        1÷
7
10
=1
3
7
       4-
2
3
=3
1
3
      
9
10
÷
3
5
=1
1
2
        8÷
2
3
=12

19
53
×0=0          2×
5
6
=1
2
3
       
4
5
÷8=
1
10

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