(1.25+0.5+2.6)×6.4怎样用简便方法计算?
展开全部
(1.25+0.5+2.6)*6.4
=(1.25+0.5+2.5+0.1)*8*0.8
=(10+4+20+0.8)*0.8
=34.8*0.8
=34.8*(1-0.2)
=34.8-6.96
=35-7-0.2+0.04
=28-0.16
=27.84
=(1.25+0.5+2.5+0.1)*8*0.8
=(10+4+20+0.8)*0.8
=34.8*0.8
=34.8*(1-0.2)
=34.8-6.96
=35-7-0.2+0.04
=28-0.16
=27.84
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
(1.25+0.5+2.6)×6.4
=3.9×6.4
=6.4×3+6.4×0.3+6.4×0.3+6. 4×0.3
=19.2+1.92+1.92+1.92
=24.96
=3.9×6.4
=6.4×3+6.4×0.3+6.4×0.3+6. 4×0.3
=19.2+1.92+1.92+1.92
=24.96
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
1.25+0.5+2.6=4.35
再用4.35×6.4=27.84
所以最后结果27.84
再用4.35×6.4=27.84
所以最后结果27.84
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