+= 3﹣= ×= ÷=
+= -= ÷51= ×5.6=
+0.625= ×= 24÷40%= 7.2÷0.9÷0.8=
68+32= 10-0.6= 1.25×80= 0.8÷0.04=
2.4÷ = × = 5×8%= ÷ =