已知45×23=1035,请你在横线里填上合适的数.4.5×2.3= ×0.23= ×0.023=0.45× =0.045× = × = × = .
%=3:8== ÷40= (填小数)
÷8=12: = %= 小数.
== %=1: = (填小数).
÷80=0.75= : == %= (填成数)
3: ===24÷ = %