问题 解答题
口算速算.
1
12
×24
=
34×
2
17
=
3
7
×
2
7
=
7
8
-
3
4
=
1
10
×
3
4
=
3
5
×0
=
答案

1
12
×24
=2
34×
2
17
=4
3
7
×
2
7
=
6
49
7
8
-
3
4
=
1
8
1
10
×
3
4
=
3
40
3
5
×0
=0

解答题
单项选择题