Сведите дробь: 1) 7/9 к знаменателю 27; 2) 3/5 к знаменателю 40, 3) 4/13 к знаменателю 78; 4) 12/17 к знаменателю 102;

ответ:

1) 7/9 = (7 • 3) / (9 • 3) = 21/27;..
2) 3/5 = (3 • 8) / (5 • 8) = 24/40;..
3) = 4/13 (4 • 6.) / (13 • 6.) = 24/78;
. 4) = 12/17 (12 • 6) / (17 • 6) = 72/102;.
5) = 4/23 (4 • 3) / (23 • 3) = 12/69;
. 6) = 5/24 (5 • 6) / (24 • 6) = 30/144...