Question

алгебраическая сумма 5/54плюс7/9

Answer 1

5/54 + 7/9 =  5/54+42/54=47/54

Answer 2

5 54 + 7 9 = 5·1 54·1 + 7·6 9·6 = 5 54 + 42 54 = 5 + 42 54 = 47 54

Answer 3

да

Answer 4

554 + 79 = 5·154·1 + 7·69·6 = 554 + 4254 = 5 + 4254 = 4754