甲乙丙三个数的和为13.653,己知甲数的小数点向右移动一位就等于乙数,乙数的小数点向右移一位就等于丙数,则甲数是 .
27÷ == :2== (填小数)
== ÷12= (小数)
=9: = :20= ÷ a:4=3a: = :4+2.
=4÷ = (填小数)= %
6÷ == :12=七成五= %