40.9953省略个位是40；40.9953十分位分别是41.0；40.9953省略百分位是41.0040.9953省略千分位分别是40.995。希望能帮到你！
40.9953≈40.995（精确到千分位）≈41.00（精确到百分位）≈41.0（精确到十分位）≈41（精确到个位）
