Сократите дроби:

13⋅5/3⋅7
18⋅15/10⋅17
17⋅19/2⋅9
8⋅14/6⋅17

13⋅5/3⋅7=65/21=3 2/2118⋅15/10⋅17=18*3/2*17= 9*3/17=27/17=1 10/1717⋅19/2⋅9=323/18=17 17/188⋅14/6⋅17= 8*7/3*17=56/51=1 5/51