首先找出各个分数的分母的最小公倍数,然后再通分计算。8,2和6的最小公倍数是24:7/8-1/2+1/6=21/24-12/24+4/24=(21-12+4)/24=13/24
首先找出各个分数的分母的最小公倍数,然后再通分计算。8,2和6的最小公倍数是24:7/8-1/2+1/6=21/24-12/24+4/24=(21-12+4)/24=13/24
7/8-5/12+1/6
=7/8-(5/12-1/6)
=7/8-(5/12-2/12)
=7/8-3/12
=7/8-1/4
=7/8-2/8
=5/8
7/8-5/12+1/6
=7/8-(5/12-2/12)
=7/8-3/12
=7/8-1/4
=7/8-2/8
=5/8