Question

直接寫出復(fù)數(shù)． 3 5 × 1 2 =	1÷ 2 3 =	4 5 ÷8=	7× 2 7 =
3 8 ×12=	1 5 × 16 25 =	1 4 - 1 5 =	28%÷4%=

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 × 1 2 = 3 10	1÷ 2 3 = 3 2	4 5 ÷8= 1 10	7× 2 7 =2
3 8 ×12= 9 2	1 5 × 16 25 = 16 125	1 4 - 1 5 = 1 20	28%÷4%=7．

點(diǎn)評(píng)：本題考查了簡(jiǎn)單的分?jǐn)?shù)乘除法的計(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)．