苏建建管2016 23:72.8*4.5-72.8+72.8*6.5(简便运算)
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/17 00:49:07
=72.8*4.5-72.8*1+72.8*6.5
=72.8*(4.5-1+6.5)
=72.8*10
=728
将
72.8*4.5-72.8+72.8*6.5
在www.google.com 里打出来`` 直接计算出结果
(72.8 * 4.5) - 72.8 + (72.8 * 6.5) = 728
(72.8 * 4.5) - 72.8 + (72.8 * 6.5)
=72.8(4.5+6.5)
=72.8*10
=728
=72.8*(4.5+-1+6.5)
=72.8*10
=728