Question

直接寫出得數(shù)． 3 4 ×8=	2 3 ÷2=	9 10 ÷ 3 5	1 6 × 3 8 =
3 5 × 5 12 =	1÷ 5 11 =	1 2 ÷60%=	5 12 ×15=
5 6 - 1 2 =	6.8÷10%=	4.5+ 1 2 =	3 8 × 2 3 =
4 5 - 1 2 =	1 4 +0.5=	1 3 8 ÷1=	1÷1 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：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： 3 4 ×8=6	2 3 ÷2= 1 3	9 10 ÷ 3 5 = 3 2	1 6 × 3 8 = 1 16
3 5 × 5 12 = 1 4	1÷ 5 11 = 11 5	1 2 ÷60%= 5 6	5 12 ×15= 25 4
5 6 - 1 2 = 1 3	6.8÷10%=68	4.5+ 1 2 =5	3 8 × 2 3 = 1 4
4 5 - 1 2 = 3 10	1 4 +0.5=0.75	1 3 8 ÷1=1 3 8	1÷1 4 5 = 5 9

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)．