(-5/12+2/3-5/6+3/8)×(24×5/9-24)=(-5/12+2/3-5/6+3/8)×24×(5/9-1)=(-5/12×24+2/3×24-5/6×24+3/8×24)×(-4/9)=(-10+16-20+9)×(-4/9)=-5×(-4/9)=20/9