问题 解答题
口算.
4
9
×
3
8
=
1
2
3
÷5=
0÷8
5
6
=
3
4
-
2
7
=
3
2
13
×4=
4
7
=
12÷5
2
3
=
12
5
9
÷5=
答案

4
9
×
3
8
=
1
6
1
2
3
÷5=
1
3
0÷8
5
6
=0
3
4
-
2
7
=
13
28
3
2
13
×4=12
8
13
4
7
=7
12÷5
2
3
=2
2
17
12
5
9
÷5=2
23
45

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