(9又1/3-3.25)/2又1/2+1.05
=6又1/12/2又1/2+1.05
=2又13/30+1.05
=3又29/60
(9又1/3-3.25)/2又1/2+1.05
=(9又1/3-3又1/4)÷2又1/2+1又1/20
=6又1/12÷2又1/2+1又1/20
=73/12×2/5+1又1/20
=2又13/30+1又1/20
=3又29/60
(9又1/3-3.25)/2又1/2+1.05
=(28/3-13/4)÷5/2+1.05
=(28/3-13/4)×2/5+1.05
=(28/3-13/4)÷5/2+1.05
=56/15-13/10+1.05
=56/15-13/10+21/20
=224/60-78/60+63/60
=209/60