5/9 + 7/8 = (40+63)/72 = 103/72
9/20 - 5/12 = (45-15)/60 =30/60 = 1/2
9/10 - (3/5 + 1/6) + 2/3 = 9/10 -(18+5)/30+ 2/3 = (27 - 23 + 20)/30 = 24/30 = 4/5
<span> 7 1/5: х=1 11/25:1 7/20
</span> 36/5: х=36/25:27/20
х=<span><span>36/5 * </span>27/20</span> : 36/25 = <span>36*27*25/(5*20*</span>36) = 27*5/20 = 27/4 = 6 3/4
(2/35+3/28)+1/28 = 2/35 + 3/28 + 1/28 = 2/35 + 4/28 = 2/35 + 1/7 = 2/35 + 5/35 = 7/35 = 1/5
(5/24+11/60)+(13/60+1/24) = 5/24 + 11/60 + 13/60 + 1/24 = 5/24 + 1/24 + 11/60 + 13/60 = 6/24 + 24/60 = 1/4 + 2/5 = 5/20 + 8/20 = 13/20
Ответ:
3,5,7,9 вот все числа
поставь Луцк и подпишись,а то он появится у тебя за спиной!