1001 :1001又1001/1002
=1001 ÷(1001x·1002+1001)/1002
=(1001x1002)/(1001x1002+1001)
=(1001x1002)/[1001x(1002+1)]
约分
=1002/1003
=1002 : 1003
1001:1001又1001/1002
=1001:(1001×1002+1001)/1002
=1001:1001×1003/1002
=1001×1002:1001×1003
=1002:1003
1001:(1001+1001/1002)
=1001:(1001X1002+1001)/1002
=1001:(1001X(1002+1))/1002
=1001:(1001X1003)/1002
=1:1003/1002