Вопрос:

Выполни действие: 13) 13:3 1/4 =

Фотография

Ответ ассистента

13) 13 : 3 1/4 = 13 : 13/4 = 13 * 4/13 = 4. 14) 13/72 * 18/23 = (13 * 18) / (72 * 23) = (13 * 1) / (4 * 23) = 13/92. 15) 6 2/7 : 3 = 44/7 : 3 = 44 / (7 * 3) = 44/21 = 2 2/21. 16) 8/45 * 8 3/4 = 8/45 * 35/4 = (8 * 35) / (45 * 4) = (2 * 7) / (9 * 1) = 14/9 = 1 5/9. 17) 9/16 : 1 5/28 = 9/16 : 33/28 = 9/16 * 28/33 = (3 * 7) / (4 * 11) = 21/44. 18) 3/14 * 21 = (3 * 21) / 14 = (3 * 3) / 2 = 9/2 = 4 1/2. 19) 4 1/4 * 1 40/51 = 17/4 * 91/51 = 91 / (4 * 3) = 91/12 = 7 7/12. 20) 4/5 : 7/11 = 4/5 * 11/7 = 44/35 = 1 9/35. 21) 2 1/3 * 1 5/9 = 7/3 * 14/9 = 98/27 = 3 17/27. 22) 7/12 : 6 = 7 / (12 * 6) = 7/72. 23) 99 * 1 2/33 = 99 * 35/33 = 3 * 35 = 105. 24) 4 1/6 : 16 2/3 = 25/6 : 50/3 = 25/6 * 3/50 = 1/2 * 1/2 = 1/4.

Другие решения

Что ещё задавали пользователи