鸡和兔放在同一笼子里,数一数,共有35个头,94只脚,问兔有 只,鸡有 只.
=0.45= %= : .
3÷5==9: = %.
÷8==0.75= %= : .
=6: =3÷8= (小数)= %
20: ==0.8= 折.