4.8+6= 0.8×0.6= 2.4×0.5= 1.25×8=
4.5-0.45= 3÷0.5= 63÷0.9= 1.2÷6=
810÷30= 0.38+3.8= 0.15×0.2=
÷= ﹣×0= ×3÷3×=