7.7×12.1-2.1×7.3简便运算?
2个回答
展开全部
7.7×12.1-2.1×7.3
=7.7×(10+2.1)-2.1×7.3
=7.7×10+7.7×2.1-2.1×7.3
=77+2.1×(7.7-7.3)
=77+2.1×0.4
=77+0.84
=77.84
=7.7×(10+2.1)-2.1×7.3
=7.7×10+7.7×2.1-2.1×7.3
=77+2.1×(7.7-7.3)
=77+2.1×0.4
=77+0.84
=77.84
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