5/35 X 4/9 + 4/7 X 6/9 1.2/9 - 2/9 X 3/10 2.5/35 X 4/9 + 4/7 X 6/9 3.5/6 除以(1/2 + 5/6) 4 .(3.4-2.4)除以1/5 X 4/7 5.(1除以1/4+1/4除以1)X 4 6.29 X 35/36 7.2000除以2000又2000/2001 8.2000/2001 X 2002 9.229又1/11除以46又1/44 10.126又1/15除以31 11.13又1/5 X 5/6+28又2/7 X 7/9