0.25×1.8+2.5×0.22简便运算?
3个回答
展开全部
0.25×1.8+2.5×0.22
=2.5×0.1×1.8+2.5×0.22
=2.5×0.18+2.5×0.22
=2.5×(0.18+0.22)
=2.5×0.4
=1
=2.5×0.1×1.8+2.5×0.22
=2.5×0.18+2.5×0.22
=2.5×(0.18+0.22)
=2.5×0.4
=1
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
0.25x1.8+2.5x0.22
=0.25x1.8+0.25x2.2
=0.25x(1.8+2.2)
=0.25x4
=1
先将2.5缩小10倍,0.22扩大10这样积保持不变,然后按乘法结合律提取相同数字,
=0.25x1.8+0.25x2.2
=0.25x(1.8+2.2)
=0.25x4
=1
先将2.5缩小10倍,0.22扩大10这样积保持不变,然后按乘法结合律提取相同数字,
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