问题 解答题
口算
5
9
×15=
3
5
×2=
1
4
×
4
5
=
1
9
×
3
7
=
5
6
÷
1
3
=
1
2
÷3=
5
7
÷5=
7
8
÷
1
2
=
答案

5
9
×15=
25
3
3
5
×2=
6
5
1
4
×
4
5
=
1
5
1
9
×
3
7
=
1
21
5
6
÷
1
3
=
5
2
1
2
÷3=
1
6
5
7
÷5=
1
7
7
8
÷
1
2
=
7
4

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