380÷19= 25+48÷24= 33+44﹣15= 40×100= 2020÷20= .
12÷ =0.75== :36= %
÷ =0.125=2÷ == %
: == ÷20= 折.
:20==0.8=24÷ =80%= 成= 折.
= ÷ ==.