直接写出得数.529+198= 0.418×100= 305﹣199= 2.05×4=8×12.5%= 0.68++0.32= +×0= ÷+0.75×8=
3÷ == :12=七成五= %
÷10==9: == :40.
18: = :20== ÷40=1.2.
1÷4= ÷12==6: = (小数)
4÷5==== [小数].