分析:求比值是根據(jù)比的意義(兩個(gè)數(shù)相除又叫兩個(gè)數(shù)的比),用比的前項(xiàng)除以比的后項(xiàng).
解答:解:①
:
=
÷=
×=
;
②0.14:0.56=
:=
÷=
×=
;
③
:
=
÷=
× 4=2;
④2:0.5=2:
=2:
=2÷
=2×2=4.
點(diǎn)評(píng):求比值是用比的前項(xiàng)除以后項(xiàng),小數(shù)化成分?jǐn)?shù)進(jìn)行計(jì)算,結(jié)果最好用分?jǐn)?shù)表示.