+329=576 ÷13="37" ﹣235=235 ×37="2331" ÷569=0 9286﹣ =80829× =609 1288÷ =23 763﹣ =0.
=12: =0.75= %
= : =27÷ =.
÷2== 折= %=0.75.
3:8= ÷ =.
:10=0.2= ÷25= %