(66-32×1.2)÷0.25 12.5×(1618-8.4÷0.12)
算一算。8-2= 7-2= 7+2=8-1= 6+3= 9-3=
算一算。10-3= 10-4= 10-5=6+1= 7+2= 8+1=
算一算。10-6= 9-1= 6-1=7-2= 8-2= 9-2=
计算:
简便计算: