1个回答
展开全部
4/5+2/3+1/5+1/3
=(4/5+1/5)+(2/3+1/3)
=1+1
=2
4/5x2/3+4/5x1/3
=4/5x(2/3+1/3)
=4/5x1
=4/5
20x(1/5+1/4)
=20x1/5+20x1/4
=4+5
=9
19x1/18
=(18+1)x1/18
=18x1/18+1x1/18
=1+1/18
=19/18
=(4/5+1/5)+(2/3+1/3)
=1+1
=2
4/5x2/3+4/5x1/3
=4/5x(2/3+1/3)
=4/5x1
=4/5
20x(1/5+1/4)
=20x1/5+20x1/4
=4+5
=9
19x1/18
=(18+1)x1/18
=18x1/18+1x1/18
=1+1/18
=19/18
本回答被网友采纳
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
