考點(diǎn):求比值和化簡(jiǎn)比
專題:比和比例
分析:(1)根據(jù)比的基本性質(zhì)作答,即比的前項(xiàng)和后項(xiàng)同時(shí)乘或除以一個(gè)數(shù)(0除外)比值不變;
(2)用比的前項(xiàng)除以后項(xiàng),如果有單位名稱,要先把單位統(tǒng)一,再用比的前項(xiàng)除以后項(xiàng)即可.
解答:
解:(1)
:0.375
=(
×1000):(0.375×1000)
=600:375
=(600÷75):(375÷75)
=8:5;
0.54:1.6
=(0.54×100):(1.6×100)
=54:160
=(54÷2):(160÷2)
=27:80;
(2)
:
=
÷=
×=
;
0.32:
=0.32÷
=0.32×
=
.
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;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).