脱式计算.205×68﹣8960(2808÷26﹣10.8)×2.52﹣2÷1×1+1÷[1×(0.5+)].
:30= %="0.6=1" 2÷ = (填分数)
:20==0.8= ÷15= %.
9:15==24÷ = %= (填小数)
4÷5= :40== %
4÷5=2÷ == 填小数.