x÷0.8=1.25 2x-0.6x=2.8
64÷0.8= 200÷1000= 32= 0.52=
23= 2.44÷0.8= 0.25×0.4= 0.8×0.8÷0.8×0.8=
+x= x-(+)=1 -x=
□○□=□( )