-1\6*4,8-(5\8-1) .................................................................................................................................
1/6×4.8=1/6×48/10-(5/8-8/8)=8/10-(-3/8)=1.175
1/6*48/10=8/10
5/8-1=5/8-8/8=—3/8
8/10-(-3/8)=11/8=1 3/8