Question

直接寫(xiě)出得數(shù)

6÷ 2 3 =	4× 2 5 =	5 6 - 1 12 =	9 10 ÷ 3 5 =
1- 5 9 =	1 9 ÷ 1 3 =	1 8 + 1 8 =	1 2 ÷ 1 12 =
1 4 + 3 8 =	6÷ 3 8 =	3 5 ×60=	5 12 × 4 5 =

Answer 1

考點(diǎn)：分?jǐn)?shù)的加法和減法,分?jǐn)?shù)乘法,分?jǐn)?shù)除法

專題：計(jì)算題

分析：同分母分?jǐn)?shù)相加減，分母不變，分子相加減．
異分母分?jǐn)?shù)相加減，先通分，變成同分母的分?jǐn)?shù)相加減，再計(jì)算．
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：

6÷ 2 3 =9	4× 2 5 = 8 5	5 6 - 1 12 = 3 4	9 10 ÷ 3 5 = 3 2
1- 5 9 = 4 9	1 9 ÷ 1 3 = 1 3	1 8 + 1 8 = 1 4	1 2 ÷ 1 12 =6
1 4 + 3 8 = 5 8	6÷ 3 8 =16	3 5 ×60=36	5 12 × 4 5 = 1 3

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)．