2009/1减2010/1的绝对值加上2010/1减去2011/1的绝对值加上2011/1减去2009/1的绝对值拜托帮帮,急着用
问题描述:
2009/1减2010/1的绝对值加上2010/1减去2011/1的绝对值加上2011/1减去2009/1的绝对值
拜托帮帮,急着用
答
2009/1减2010/1的绝对值加上2010/1减去2011/1的绝对值加上2011/1减去2009/1的绝对值
=1/2009-1/2010+1/2010-1/2011+1/2009-1/2011
=2/2009-2/2011
=4/2009x2011
=4/4040099
答
2009/1减2010/1的绝对值加上2010/1减去2011/1的绝对值加上2011/1减去2009/1的绝对值
=1/2009-1/2010+1/2010-1/2011+1/2009-1/2011
=2/2009-2/2011
=2(2011-2009)/(2009x2011)
=4/4040099
(这类题步骤是去绝对值,去括号,再化简计算)