1乘以3分之4减去3乘以5分之8加上5乘以7分之12减去7乘以9分之16
展开全部
1乘以3分之4减去3乘以5分之8加上5乘以7分之12减去7乘以9分之16
=4/3 - (4/3 - 4/5) + (6/5 -6/7) - (8/7 - 8/9)
=4/5 + 6/5 - (6/7 + 8/7) + 8/9
=2 - 2 + 8/9
=8/9
1乘以3分之4= 4/3
3乘以5分之8= 4/3 - 4/5
5乘以7分之12= 6/5 -6/7
7乘以9分之16= 8/7 - 8/9
=4/3 - (4/3 - 4/5) + (6/5 -6/7) - (8/7 - 8/9)
=4/5 + 6/5 - (6/7 + 8/7) + 8/9
=2 - 2 + 8/9
=8/9
1乘以3分之4= 4/3
3乘以5分之8= 4/3 - 4/5
5乘以7分之12= 6/5 -6/7
7乘以9分之16= 8/7 - 8/9
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询