计算题-1/8+1/5-5/8+2/5=(1/5+2/5)-(1/5+5/8)=3/5-3/4= -3/20
-1/8+1/5-5/8+2/5=(1/5+2/5)-(1/5+5/8)=3/5-3/4= -3/20希望采纳,谢谢