6.9628保留整数是 ;保留到十分位是 ;保留两位小数是 ;保留三位小数是 .
3﹕ ==0•375=6÷ = %
=0.4=12: =6: = %.
÷8=3: =25%= 填小数.
0.75=3: =9÷ = %.
3÷ = :10==0.6.