Question

直接寫得數(shù)．

3 5 ÷3=	3 4 ×2=	1 2 ÷3=	3÷ 3 5 =
4 5 ÷ 1 5 =	15÷ 3 2 =	1 4 ÷ 2 3 =	4 7 + 2 7 =

Answer 1

分析：分?jǐn)?shù)乘法：分子相乘的積做分子，分母相乘的積做分母，能約分的先約分；
分?jǐn)?shù)除法：除以一個(gè)不為零的數(shù)等于乘上這個(gè)數(shù)的倒數(shù)．

解答：解：

3 5 ÷3= 1 5	3 4 ×2= 3 2	1 2 ÷3= 1 6	3÷ 3 5 =5
4 5 ÷ 1 5 =4	15÷ 3 2 =10	1 4 ÷ 2 3 = 3 8	4 7 + 2 7 = 6 7

點(diǎn)評(píng)：本題考查簡(jiǎn)單的分?jǐn)?shù)計(jì)算，計(jì)算時(shí)要細(xì)心，注意把結(jié)果化成最簡(jiǎn)分?jǐn)?shù)．