159*353535/535353-105*103/104
=159*35/53-105*103/104
=3*35-105*103/104
=105*(1-103/104)
=105/104
159乘535353分之353535减105乘104分之103的简便运算
159*353535/535353-105*103/104
=159*35/53-105*103/104
=3*35-105*103/104
=105*(1-103/104)
=105/104