小数问题将5.425(425的循环)乘0.63的积写成小数形式.
将5.425(425的循环)乘0.63的积写成小数形式.
5.425(425的循环)=5+425/999=5420/999 5420/999×0.63=5420/999×63/100=34146/9990=3+4176/9990 =3.4180(180的循环) 因为4176+4=4180