小青蛙每跳一步的距离是5分米,现在它在离岸边280厘米的荷叶上,小青蛙最少要跳 步才能跳到岸上.
4: == ÷10= %
36÷ ==0.4=4: = %
:20==80%=20÷ = (填小数)
==12÷ = (填小数)
=0.75=( )÷8( )%=24:( )