(1)18.25+6.2+1.75=6.2+( + )。(2)19.2﹣6.8﹣3.2= ﹣( + )
÷12=12: =0.75== %.
1.6÷40= %= : == .
4÷ ====.
0.6==12: == ÷100.
=0.8= ÷20=20: = %= 折.