精确到小数点后两位,怎么说？

to 2 decimal places-----这是精确到小数点后两位的说法
几乎不可能，我想是“almost impossible”

Do calculation of such an examination questions in self's head , arrive at radix point last two nearly impossibly accurately

It's impossible to deal with such a subject that precision to two decimal by placesmental arithmetic.

Mathematical problems such as mental arithemetic cannot be so precise as getting to two places of decimals.