问题 解答题
直接写出得数.
5
12
=
7
8
÷7=
5
8
÷
2
3
=
4×1
3
7
=
3
8
×
2
3
=
5
7
÷
10
21
=
1
2
÷5=
3
10
=
4
5
-
1
2
=
1
4
+0.5=
1
3
8
÷1=
1÷1
4
5
=
答案

5
12
=
5
2
7
8
÷7=
1
8
5
8
÷
2
3
=
15
16
4×1
3
7
=
40
7
3
8
×
2
3
=
1
4
5
7
÷
10
21
=
3
2
1
2
÷5=
1
10
3
10
=
3
2
4
5
-
1
2
=
3
10
1
4
+0.5=
3
4
1
3
8
÷1=1
3
8
1÷1
4
5
=
5
9

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