题目内容
直接写得数:
×0=
×
=
×12=
×
=
×
=
×
=
9×
=
×
=
1 |
3 |
1 |
4 |
2 |
5 |
5 |
6 |
7 |
12 |
3 |
14 |
8 |
9 |
3 |
8 |
3 |
10 |
10 |
3 |
9×
7 |
18 |
2 |
3 |
9 |
10 |
分析:本题根据分数乘法的运算法则计算即可.
解答:解:
×0=0
×
=
×12=10
×
=
×
=
×
=1
9×
=
×
=
1 |
3 |
1 |
4 |
2 |
5 |
2 |
5 |
5 |
6 |
7 |
12 |
3 |
14 |
1 |
8 |
8 |
9 |
3 |
8 |
1 |
3 |
3 |
10 |
10 |
3 |
9×
7 |
18 |
7 |
2 |
2 |
3 |
9 |
10 |
3 |
5 |
点评:分数乘整数,用分数的分子和整数相乘的积做分子,分母不变.分数乘分数,用分子相乘的积做分子,分母相乘的积做分母,能约分的要约分.
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