一个两位小数,个位上是1,小数点后第一位是3,第二位是2,这个小数写作 .
÷25== = (小数)= %= 成.
12: == :4=0.25= 折.
=2: =4÷ = %=0.2.
12÷ = :12=0.75= = %
0.75=6÷ = :12== %