0.6+1.2= 0.8-0.06 = 2+1.8= 1-0.09=
4.5+5= 6+0.04= 18.5-5= 7.77-7.7=
45+2.5 = 3.33-2.22=
进价
降价前售价
降价后售价
56元/个
78元/个
48元/个
12.34×9+0.05=111.11
123.45×9+0.06=1111.11
×9+=
=10-6
=4
2×10-6×2
=20-12
=8
3×10-6×3
=-
=
×10-6×