12﹣3.6= 12×0.5= 36×25%= ×6+=
+= ÷4= 0××5= 28÷1.25÷8=
9.09﹣0.9= 0.8×0.32= 50÷10%= 0.125×32× =
7÷14%= = = 2.5+2.5÷5=