25+40.5-43.6简便计算?
7个回答
展开全部
25+40.5-43.6
=25+40.5-43.6+3.1-3-0.1
=25+(40.5+3.1)-43.6-3-0.1
=25+43.6-43.6-3-0.1
=25-3-0.1
=22-0.1
=21.9
不知道你学到哪里了,但是有一点,只有加法有交换律和结合律。如果没有学负数,只有这样解题了。
=25+40.5-43.6+3.1-3-0.1
=25+(40.5+3.1)-43.6-3-0.1
=25+43.6-43.6-3-0.1
=25-3-0.1
=22-0.1
=21.9
不知道你学到哪里了,但是有一点,只有加法有交换律和结合律。如果没有学负数,只有这样解题了。
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?
展开全部
25+40.5-43.6
=25+40.5+3+0.1-43.6-3-0.1
=25+43.6-43.6-3-0.1
=25-3-0.1
=22-0.1
=21.9
=25+40.5+3+0.1-43.6-3-0.1
=25+43.6-43.6-3-0.1
=25-3-0.1
=22-0.1
=21.9
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
25+40.5-43.6
=25+40+0.5-44+0.4
=(25+40-44)+(0.5+0.4)
=21+0.9
=21.9
=25+40+0.5-44+0.4
=(25+40-44)+(0.5+0.4)
=21+0.9
=21.9
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
原式=25+40.5-43.6
=65.5-43.6
=65.6-43.6-0.1
=22-0.1
=21.9
=65.5-43.6
=65.6-43.6-0.1
=22-0.1
=21.9
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