1/2 1/3 1/61/6+2/3=5/6
因为2/3可以化成4/6
分母相同，分子相加六分之十三=7/10-(1/5+1/6)
=7/10-11/30
=21/30-11/30
=1/3将小数划船分数逐一计算即可2-1/6+1/3=12/6-1/6+2/6=13/6=(1十2十3十4十5十6十7)十(1/2十1/3十1/4十1/5十1/6十1/7十1/8)=28十(1/2十1/4十1/8)十(1/3十1/6)十1/5)=28十7/8十1/2十1/5=29又23/401/2+1/3+1/6=1