1.25÷0.5= ÷5=125÷ 计算.
: =1= 12 ÷10= %
4:5=24÷3.5: =5:7.
2:5=24: = :15== %= 成= 折.
: =1.4=70/ = %
=60%= ÷20=3: = (小数)