(1)45:150,
=(45÷15):(150÷15),
=3:10;
45:150,
=3:10,
=3÷10,
=
.3 10
(2)150米:2千米,
=150米:2000米,
=(150÷50):(2000÷50),
=3:40;
150米:2千米,
=3:40,
=3÷40,
=
.3 40
45:150=3:10=0,3
150米:2千米=150:2000=3:40=0.075额额额额
(1)45:150=3:10=0,3
(2)150米:2千米=150:2000=3:40=0.075
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解45:150=3:10=0.3
150m:2km=150:2000=3:40=3/40