18.9╳2.5╳3.7怎么简便
2个回答
展开全部
18.9×2.5X3.7
=(20-1.1)×5×0.5×(4-0.3)
=(20x5-1.1×5)(0.5×4- 0.5×0.3)
=(100-5.5)x(2-0.15)
=100×2-100×0.15-5.5×2+5.5×0.15
=200-15-11十0.825
=174十0.825
二174.825
=(20-1.1)×5×0.5×(4-0.3)
=(20x5-1.1×5)(0.5×4- 0.5×0.3)
=(100-5.5)x(2-0.15)
=100×2-100×0.15-5.5×2+5.5×0.15
=200-15-11十0.825
=174十0.825
二174.825
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