2012-20112011*2011-20122012(简便计算)
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/07 04:47:43
2012-20112011*2011-20122012(简便计算)
![2012-20112011*2011-20122012(简便计算)](/uploads/image/z/8131099-67-9.jpg?t=2012-20112011%2A2011-20122012%EF%BC%88%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%29)
2012 - 20112011 * 2011 - 20122012
= 2012 - 2011 * 10001 - 2012 * 10001
= 2012 - (2011 + 2012) * 10001
= 2012 - 2012 * 10001 + 10001
= 2012 * (1 - 10001) + 10001
= 2012 * (-10000) + 10000 + 1
= 10000(1 - 2012) + 1
= -20110000 + 1
= -20100009
= 2012 - 2011 * 10001 - 2012 * 10001
= 2012 - (2011 + 2012) * 10001
= 2012 - 2012 * 10001 + 10001
= 2012 * (1 - 10001) + 10001
= 2012 * (-10000) + 10000 + 1
= 10000(1 - 2012) + 1
= -20110000 + 1
= -20100009