(3/4-7/6+1/12)÷(-1/24)=3/4×(-24)-7/6×(-24)+1/12×(-24)=-18+28-2=8是12分之11(3/4-7/6+11/12)÷(-1/24)=3/4×(-24)-7/6×(-24)+11/12×(-24)=-18+28-22=-12