99.5001保留整数是 ,保留一位小数是 ,精确到千分位是 .
0.2÷0.8=20÷ =4: = %.
5:13==(5﹣4): .
24÷23= (用分数表示),0.07中有 个.
3÷5== %=3: .
÷24=24: == %