0.375×0.375= 1 ÷12.5%=
1÷25%=
0.22=
-0.2=
×2 ÷ ×2=
1.4-1.08=
0×(-)=
+÷+=
99×0.8+0.8=
面包
饼干
汽水
包子
2元/个
5元/包
3元/个
1元/个
1﹣+= 1÷×= 0.5﹣+0.5﹣=
8.1+= (+)×24= 7××7÷=