Привидите дроби к общему знаменателю: а)5/4 и 3/2;б) 2/3 и 2/15; в)7/15 и 5/9: г)1/6 и 3/10; д) 1/3 и 5/18; е)5/8 и 2/3;

Приведем обыкновенные дроби к общему знаменателю: а) 5/4 и 3/2 = (3 * 2)/(2 * 2) = 6/4; б) 2/3 = (2 * 10)/(3 * 10) = 20/30 и 2/15 = (2 * 2)/(15 * 2) = 4/30 ; в) 7/15 = (7 * 3)/(15 * 3) = 21/45 и 5/9 = (5 * 5)/(9 * 5) = 25/45 : г) 1/6 = (1 * 5)/(6 * 5) = 5/30 и 3/10 = (3 * 3)/(10 * 3) = 9/30 ; д) 1/3 = (1 * 6)/(3 * 6) = 6/18 и 5/18; е) 5/8 = (5 * 2)/(8 * 2) = 10/16 и 2/3 = (2 * 6)/(3 * 6) = 12/18; ж) 1/2 = (1 * 15)/(2 * 15) = 15/30 и 2/15 = (2 * 2)/(15 * 2) = 4/30; з) 5/12 = 25/60 и 7/15 = 28/60; и) 3/10 = 30/100 и 33/100.