问题 解答题
3
4
×16=
12÷
3
5
=
0.3×
5
6
=
7
8
=
1
2
×
2
3
=
15×
2
9
=
4
5
÷
5
4
=
5
7
×
2
3
÷
5
7
=
1
2
×
1
3
÷
1
2
×
1
3
=
7
12
+
1
8
=
答案

3
4
×16=12
12÷
3
5
=20
0.3×
5
6
=
1
4
7
8
=
8
7
1
2
×
2
3
=
1
3
15×
2
9
=
10
3
4
5
÷
5
4
=
16
25
5
7
×
2
3
÷
5
7
=
2
3
1
2
×
1
3
÷
1
2
×
1
3
=
1
9
7
12
+
1
8
=
1
8

单项选择题
单项选择题