2.7*4.9+7.4*4.9-0.49怎么用简便算法
2016-04-09 11:04发布
妞妞
方法反反复复凤飞飞反复
0.49换成4.9*0.1，然后把3个4.9提出来，最后是4.9*（2.7+7.4-0.1）。然后算
就是=（2.7+7.4-0.1）*4.9=10*4.9=49
2.7*4.9+7.4*4.9-0.49
=13.23+36.26-0.49
=85.26
=4.9x(2.7+7.4-0.1)
=4.9x10
=49
=（2.7+7.4-0.1）x4.9
=10x4.9
（2.7+7.4-0.1）X4.9
=2.7x4.9+7.4x4.9-4.9x0.1
=2.7+7.4-0.1）*4.9=49
=4.9x（2.7+7.4-0.1）
解答：2.7*4.9+7.4*4.9-0.49
最多设置5个标签!
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://wenda.whatsns.com/data/attach/logo/logo.png', '推荐 妞妞 的问题《2.7*4.9+7.4*4.9-0.49怎么用简便算法》','https://wenda.whatsns.com/q-234834.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
付费偷看金额在0.1-10元之间
0.49换成4.9*0.1，然后把3个4.9提出来，最后是4.9*（2.7+7.4-0.1）。然后算
就是=（2.7+7.4-0.1）*4.9=10*4.9=49
2.7*4.9+7.4*4.9-0.49
=13.23+36.26-0.49
=85.26
2.7*4.9+7.4*4.9-0.49
=4.9x(2.7+7.4-0.1)
=4.9x10
=49
2.7*4.9+7.4*4.9-0.49
=（2.7+7.4-0.1）x4.9
=10x4.9
=49
（2.7+7.4-0.1）X4.9
2.7*4.9+7.4*4.9-0.49
=2.7x4.9+7.4x4.9-4.9x0.1
=（2.7+7.4-0.1）x4.9
=10x4.9
=49
=2.7+7.4-0.1）*4.9=49
2.7*4.9+7.4*4.9-0.49
=2.7x4.9+7.4x4.9-4.9x0.1
=4.9x（2.7+7.4-0.1）
=4.9x10
=49
解答：2.7*4.9+7.4*4.9-0.49
=（2.7+7.4-0.1）x4.9
=10x4.9
=49
一周热门 更多>