解：876-66×4÷3 =876-66÷3×4 =876-22×4 =876-88 =788
876-66*4/3=876-4*66/3=876-4*22=876-88=788
876-66x4/3=810+66-66x4/3=810+66x(1-4/3)=810+66x(-1/3)=810-22=788
