6.4÷0.8=
80×2.5=
0.3+0.78=
9.9×0.2×50=
6.6÷6=
1.5×0.3=
1-0.02=
1.8×8+1.8×2=
0.2×1.40.2 4.2÷0.64.2
1.25÷1000.01×1.25 0.4×0.40.4÷0.4