问题 解答题
口算
3
4
=
1
7
÷
1
7
=
37
193
=
5
6
-
1
2
=
7
8
+
1
4
7
12
×
4
7
=
4
5
÷
4
3
=
0.2:1=
答案

3
4
=3
1
7
÷
1
7
=1
37
193
=0
5
6
-
1
2
=
1
3
7
8
+
1
4
=
9
8
7
12
×
4
7
=
1
3
4
5
÷
4
3
=
3
5
0.2:1=
1
5

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