丨1/2009-1/2010丨+丨1/2010-1/2011丨+丨1/2011-1/2009丨
丨1/2009-1/2010丨+丨1/2010-1/2011丨+丨1/2011-1/2009丨
计算丨1/2008-1/2009丨+丨1/2009-1/2010丨+丨1/2010-1/2011丨
丨1/2013-1/2012丨+丨1/2012-1/2011丨+丨1/2011-1/2010丨
丨1/2011-1/1010丨-丨1/2012-1/2010丨+丨1/2012-1/2011
用简便方法计算丨1/3-1/2丨+丨1/4-1/3丨+丨1/5-1/4丨+...+丨1/2010-1/2009丨的值
丨1/4-1/2丨+丨1/6-1/4丨+丨1/8-1/6丨+···+丨1/2012-1/2010丨
丨1/2014-1/2013丨+丨1/2013-1/2012丨+丨1/2012-1/2011丨+丨1/2011-1/20
丨-9丨+丨+1丨= 丨-10丨-丨-8丨= 丨-4丨×丨6.2丨= 丨24丨÷丨-3丨×丨-2丨=
2()------------------()丨 / 丨丨3 / 1 丨4丨 / 丨 ()---------------
绝对值化简:丨a+1丨-丨c-b丨+丨b-1丨
如果a、b、c为整数,并且丨a-b丨的2009次方+丨c-a丨的2011次方=1,则丨c-a丨+丨a-b丨...
丨a+b丨-丨b-1丨-丨a-c丨-丨a-c丨=