A÷B=0.2(A、B都是0除外的自然数)那么它们的最大公因数是B. .
=8: = %
36: =0.75== ÷40= 折.
0.375=== :64= %
( )+= ×=÷ = ﹣= :4=0.5.
÷ ==30: =1.2= %.