Question

(15/56-13/42+11/30-9/20+7/12-1/3)/1/22*91/1/8

Answer 1

15/56-13/42=(45-52)/168=-7/168=-1/24

11/30-9/20=(22-27)/60=-5/60=-1/12

7/12-1/3=(7-4)/12=3/12=1/4

15/56-13/42+11/30-9/20+7/12-1/3

=-1/24-1/12+1/4

=(-1-2+6)/24

=3/24=1/8

所以原式=[(1/8)/(1/22)]*91/(1/8)

=(22/8)*91*8

=22*91

=2002