0.48+0.48+0.48+0.48=________×________
0.75×5=________+________+________+________+________．0.4840.750.750.750.750.75
分析：根据小数乘法的意义，求几个相同加数和的简便运算，进行解答即可．
解答：0.48+0.48+0.48+0.48=0.48×4
0.75×5=0.75+0.75+0.75+0.75+0.75．
故答案为：0.48，4，0.75，0.75，0.75，0.75，0.75．
点评：此题考查了小数乘法的意义及运用．