2.5×0.4= 1.5×6= 0.72÷9= 2.2×5×0.7=
0.78×0= 0.28÷0.4= 0.3×0.3= 4.8÷0.6÷0.8=
12.6÷3= 0.25÷0.1= 0.64÷0.32= （2.5-1.5）÷0.2=
1.6×0.04=
3.24÷0.3=
2.5×4=
36.8÷0.8=
720÷600=
1.25×0.08=
20÷0.4=
16.3÷0.4÷0.5=
