51又1/4*4/5+41又1/3*3/4+31又1/2*2/3 2013*2011/2012+1/2012简算

51又1/4*4/5+41又1/3*3/4+31又1/2*2/3 2013*2011/2012+1/2012简算
51又1/4*4/5+41又1/3*3/4+31又1/2*2/3 2013*2011/2012+1/2012简算

51又1/4*4/5+41又1/3*3/4+31又1/2*2/3 2013*2011/2012+1/2012简算
51又1/4*4/5+41又1/3*3/4+31又1/2*2/3
=(50+5/4)*4/5+(40+ 4/3)*3/4 +(30+ 3/2)*2/3
=40 + 1 + 30 +1 + 20 +1
=93
.
2013*2011/2012+1/2012
=(2012+ 1)*2011/2012+1/2012
=2011 + 2011/2012+1/2012
=2011 +1
=2012

简算
51又1/4*4/5+41又1/3*3/4+31又1/2*2/3
解，得：
==205/4*4/5+124/3*3/4+63/2*2/3
==41+31+21
==72+21
==93



2013*2011/2012+1/2012
解，得：
==(2012+1)*2011/2012+1/2012
==(2012*2011+2011+1)/2012
==(2012*2011+2012)/2012
==[2012*(2011+1)]/2012
==2012