分析:(1)先把0.6:
的前項(xiàng)化成
,再根據(jù)比的性質(zhì)把
:
的前、后項(xiàng)同時(shí)乘兩個(gè)分母的最小公倍數(shù)20,先化成整數(shù)比,再把整數(shù)比的前、后項(xiàng)同時(shí)除以它們的最大公因數(shù)即可化成最簡(jiǎn)比;
(2)根據(jù)求比值的方法,用最簡(jiǎn)比的前項(xiàng)除以后項(xiàng)即得比值.
解答:解:(1)0.6:
,
=
:
,
=(
×20):(
×20),
=12:15,
=(12÷3):(15÷3),
=4:5;
(2)0.6:
,
=4:5,
=4÷5,
=
.
故答案為:4:5,
點(diǎn)評(píng):此題考查化簡(jiǎn)比和求比值的方法,要注意區(qū)分:化簡(jiǎn)比是根據(jù)比的基本性質(zhì)進(jìn)行化簡(jiǎn)的,結(jié)果仍是一個(gè)比,它的前項(xiàng)和后項(xiàng)都是整數(shù),并且是互質(zhì)數(shù);求比值是用比的前項(xiàng)除以后項(xiàng)所得的商,結(jié)果是一個(gè)數(shù),可以是小數(shù)、分?jǐn)?shù)和整數(shù).