求各位学霸们,帮帮我,要验算哦
2014-10-05
展开全部
(4.5+6.5)×4.2÷2
=11×4.2÷2
=46.2÷2
=23.1(dm²)
验算:23.1×2÷4.2-6.5
=46.2÷4.2-6.5
=11-6.5
=4.5(dm)
=11×4.2÷2
=46.2÷2
=23.1(dm²)
验算:23.1×2÷4.2-6.5
=46.2÷4.2-6.5
=11-6.5
=4.5(dm)
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