2012÷2012又2012/2013 简算!

把2012放里边.
就= 2012x[ 2013/ 2012(2013+1)]
=2013/2014
再问： 不太明白，能否讲详细点？谢谢！
再答： 2012÷2012又2012/2013 = 2012 ÷ (2012 + 2012/2013) = 2012 ÷ (2012x2013 + 2012)/2013 = (2012 x 2013) / (2012x2013 + 2012) = (2012 x 2013) / (2013 + 1)2012 = 2013 / 2014
再问： = (2012 x 2013) / (2012x2013 + 2012) = (2012 x 2013) / (2013 + 1)2012 = 2013 / 2014 这部分还不太懂，劳驾帮忙。谢谢！
再答： = (2012 x 2013) / (2012x2013 + 2012) = (2012 x 2013) / (2012x2013 + 2012x1) = (2012 x 2013) / [2012 x (2013 + 1)] = (2012 x 2013) / (2012 x 2014) = 2013 / 2014