3: 27×(1-1/9)
= 27×8/9
= 24(吨)
4: 350×(1+1/10)
= 350×11/10
= 385(万元)
5: 810×(1-2/9)
= 810×7/9
= 630(元)
6: 84×(1+3/7)
= 84×10/7
= 120(人)
提交 重置