2011÷20112011/2012+1/2013,简便运算.
问题描述:
2011÷2011
+2011 2012
,简便运算. 1 2013
答
2011÷2011
+2011 2012
1 2013
=2011÷
+2011×2012+2011 2012
1 2013
=2011×
+2012 2011×(2012+1)
1 2013
=
+2012 2013
1 2013
=1