1/2+1/3+1/4+1/5+1/6+1/10
=(1/2+1/3+1/6)+(1/4+1/5+1/10)
=1+11/20
=31/20(或1.55)
先通分,在进行计算。
(因为6是2和3的倍数,所以1/2,1/3,1/6先通分,后相加。20是4,5,10的倍数,所以1/4,1/5,1/10在一起先通分后相加)
1/2+1/3+1/4+1/5+1/6+1/10=3/6+2/6+1/4+1/5+1/6+1/10=5/6+1/4+1/5+1/6+1/10=10/12+3/12+1/5+1/6+1/10=13/12+2/10+2/12+1/10=15/12+3/10=5/4+3/10=25/20+6/20=31/20=1.55
1/2+1/3+1/4+1/5+1/6+1/10=83/60=60(1/23).
1/2+1/3+1/4+1/5+1/6+1/10
=3/4+3/6+3/10
=15/20+10/20+6/20
=31/20