把下列分数化成小数(除不尽的保留三位小数). 6 8 =6÷8=0.75; 7 25 =7÷25=0.28; 4 5 =4÷5=0.8; 5 9 =5÷9≈0.556; 3 4 =3÷4=0.75. 故答案为:0.75、0.28、0.556、0.75.