3/4+(2/3-5/8)=3/4+2/3-5/8=6/8-5/8+2/3=1/8+2/3=3/24+16/24=19/24谢谢,请采纳
3/4+括号2/3-5/8括号=3/4-5/8+2/3=1/8+2/3=3/24+16/24=19/24