Question

18 4/21-(10 10/21 + 3 19/21)​

Answer 1

Ответ:

$18 \frac{4}{21} - (10 \frac{10}{21} + 3 \frac{19}{21} ) = \\ \frac{382}{21} - ( \frac{220}{21} + \frac{82}{21} ) = \\ \frac{382}{21} - \frac{302}{21} = \frac{382 - 302}{21} = \\ = \frac{80}{21} = 3 \frac{17}{21}$