小西喝了一杯牛奶的,小东也喝了一杯牛奶的,他们喝的一定一样多. .
12÷ ==0.375= :64= ÷24.
=== ÷ = (小数)
== :20= ÷ .
: ===4÷ .
9: =3:4=12: == (此空填小数)