12﹣3.6= 12×0.5= 36×25%= ×6+=
+= ÷4= 0××5= 28÷1.25÷8=
-(-)=
1.25×3.2×0.25=
0.06×1.7=
1.6÷=
×6÷×6=
1÷1%=
6--=
5×÷5×
进价
降价前售价
降价后售价
56元/个
78元/个
48元/个
(下)