Найди значение выражения а) 3(целых) 5/8 * 1 (целую) 7/9 * 21/58; б) (2/9+5/6)*36; в) (4-7/8)*(3+1/5) да знаю есть такой ответ но в конце было 4-7/18 и он правильный или нет?

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вопрос Следующий
вопрос

а) 3 5/8 1 7/9 21/58 = 3 5/8 1 + 7/9 21/58 = 15/8 1 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 21/58 = 15/8 + 7/9 * 21/58 = 80/49

б) (2/9+5/6)36 = (4/18 + 30/18) 36 = 34/18 * 36 = 612/18 = 34

в) (4-7/8)(3+1/5) = (4 - 7/8) (15/5 + 1/5) = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) 16/5 = (4 - 7/8) * 16/5 = 108/5

Ответы:
а) 80/49
б) 34
в) 108/5 (или 4 - 7/8 = 4 - 14/16 = 4 - 7/8 = 4 - 0.875 = 3.125)