Question

7× 3 14 =	3 7 ÷6=	4 5 ÷ 5 4 =	1 2 + 1 3 =
1÷3× 1 3 =	5 14 ÷ 5 14 =	1 8 ÷ 5 2 =	1 3 - 1 6 =

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)；
異分母分?jǐn)?shù)相加減，先通分變成同分母的分?jǐn)?shù)再計(jì)算．

解答：解：

7× 3 14 = 3 2	3 7 ÷6= 1 14	4 5 ÷ 5 4 = 16 25	1 2 + 1 3 = 5 6
1÷3× 1 3 = 1 9	5 14 ÷ 5 14 =1	1 8 ÷ 5 2 = 1 20	1 3 - 1 6 = 1 6 ．

點(diǎn)評(píng)：本題考查了簡(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)．