Вычислите: 1/2-1/3-1/5= 1/4-1/5-1/10= 1/2-1целая1/3-1/6= 1/4-1целая1/2+1/8= зарание !

1/2-1/3-1/5=15/30-10/30-6/30=-1/30
1/4-1/5-1/10=5/20-4/20-2/20=-1/20
1/2-1 1/3 -1/6=1/2-4/3-1/6=3/6-8/6-1/6=-6/6=-1
1/4-1 1/2+1/8=1/4-3/2+1/8=2/8-12/8+1/8=-9/8= =-1 1/8