题目内容

直接写得数
2
3
÷
4
15
=
2
27
=
9
10
×
3
5
=
3÷8= 15÷
9
25
=
1
7
=
1
7
÷
1
2
=
3
8
-
1
3
=
3
22
×11
=
7
8
÷
3
16
=
5
7
÷
10
12
=
1
2
+
3
5
=
分析:分数乘法:分子相乘的积做分子,分母相乘的积做分母;
分数除法:除以一个数(0除外)等于乘这个数的倒数.
解答:解:
2
3
÷
4
15
=
5
2
2
27
=
27
2
9
10
×
3
5
=
27
50
3÷8=
3
8
15÷
9
25
=
125
3
1
7
=56,
1
7
÷
1
2
=
2
7
3
8
-
1
3
=
1
24
3
22
×11
=
3
2
7
8
÷
3
16
=
14
3
5
7
÷
10
12
=
6
7
1
2
+
3
5
=
11
10
点评:本题考查了简单的分数计算,计算时要细心,注意把结果化成最简分数.
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