问题 解答题
直接写出得数.
1
5
+
4
5
=
3
4
-
1
4
=
2
5
×2=
3
7
×
1
3
=
5
9
×
3
5
=
4
9
÷4=
3
5
÷
1
5
=
12×
3
4
=
21
25
÷42=
1
2
×
2
3
=
1
7
×14=
4
11
÷4=
答案

1
5
+
4
5
=1
3
4
-
1
4
=
1
2
2
5
×2=
4
5
3
7
×
1
3
=
1
7
5
9
×
3
5
=
1
3
4
9
÷4=
1
9
3
5
÷
1
5
=3
12×
3
4
=9
21
25
÷42=
1
50
1
2
×
2
3
=
1
3
1
7
×14=2
4
11
÷4=
1
11

单项选择题
单项选择题