根据2871÷33=87,可以推算出:3.3×0.87= ,28.71÷0.87= .
2: == ÷6== %
6: ==3:2=18÷ = :10.
:8==0.375= %.
6÷ == :12= %= (小数)
÷24=0.3750==24: = %.