直接寫得數(shù)
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:分數(shù)乘法:分子相乘的積做分子,分母相乘的積做分母;
分數(shù)除法:除以一個數(shù)(0除外)等于乘這個數(shù)的倒數(shù).
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
點評:本題考查了簡單的分數(shù)計算,計算時要細心,注意把結(jié)果化成最簡分數(shù).
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