Question

12 14 + 27 21' 3 2 + 11 6​

Answer 1

Ответ:

13/28 - 5/28 = (13 - 5)/28 = 8/28 = (2 * 4)/(7 * 4) = 2/7;

12/27 + 14/21 = (12 * 7)/(27 * 7) + (14 * 9)/(21 * 9) = 84/189 + 126/189 = (84 + 126)/189

210/189 = (10 * 21)/(9 * 21) = 10/9 = (1 * 9 + 1)/9 = 1 1/9;

2 3/11 + 3 1/6 = 5 + 3/11 + 1/6 = 5 + (3 * 6)/(11 * 6) + (1 * 11)/(6 * 11) =5+ 18/66 + 11/66 = 5 + (18 + 11)/66 = 5 + 29/66 = 5 29/66 .