617,618 пж срочно даю 25 баллов

617] ➡️А] 1/4: 3 1/2= 1/4: 7/2= 1/4• 2/7= 1/2• 1/7= 1/14. ➡️Б] 3 1/2: 2 1/3= 7/2: 7/3= 7/2• 3/7= 1/2• 3/1= 3/2= 1 1/2.➡️ В] 10 1/2: 3 1/2= 21/2: 7/2= 21/2• 2/7= 3/1• 1/1= 3. ➡️Г] 5 1/2: 3 2/3= 11/2: 11/3= 11/2• 3/11= 1/2• 3/1= 3/2= 1 1/2.➡️ Д] 3 3/5: 6 3/4= 18/5: 27/4= 18/5• 4/27= 2/5• 4/3= 8/15. ➡️➡️➡️ 618] ➡️А] 4/7• 5/24: 1 1/14= 1/7• 5/6: 15/14= 1/7• 5/6• 14/15= 1/1• 1/6• 2/3= 1/1• 1/3• 1/3= 1/9. ➡️Б] 25• 7/15: 7/9= 5/1• 7/3• 9/7= 5/1• 1/1• 3/1= 15. ➡️В] 7/18: 20/21: 5/12= 7/18• 21/20• 12/5= 7/6• 7/10• 6/5= 7/1• 7/10• 1/5= 49/50. ➡️Г] 5/9• 2 1/4: 20= 5/9• 9/4• 1/20= 5/1• 1/4• 1/20= 1/1• 1/4• 1/4= 1/16.