0.69÷0.3=÷3
10.05÷5=÷0.5
20分=时(用循环小数表示)
0.52km2=公顷
4.9×9.950 1.48÷0.560.56×1.48
3.2÷0.013.2×0.01 2.4×3.50.35×24
4.6×2= 7.8÷3= 5.1÷0.01= 70×0.3= 0.38+0.62=
5.4÷9= 1.2×0.3= 3.5a+a= 12.7-5= 0.3×0.3×0.3=
345﹣298= 0.64÷0.8= ﹣ = × =
1÷0.05= 0.25×40= 2÷ = ×25%=