小学常用数值的计算

一、常用分数、小数的互化1/2 =0.5=50%1/3 ≈0.333 =33.3%2/3 ≈0.667=66.7%1/4 =0.25=25%3/4 =0.75=75%1/5 =0.2=20%2/5 =