省略乘号,写出下列各式x×y a×8 1×b 6×a×b a+a x×x×9 a×a 2×x .
4÷5==8: = (填小数)= 折.
0.25== %= ÷ = : .
÷12==0.5= %= : .
=3÷ = %
= :8=0.375=12÷ = %