两个相邻自然数的倒数之差是,这两个数的和是 .
75%= (小数)= (成数)= (折数)= : .
:40= =36÷ =0.45= .
0.6= : = ÷15= %.
12: == %= ÷4=0.75.
(1)= ÷ = %= (小数)(2) ÷ =0.875=(﹣)= %.