Question

СРОЧНО ПОМОГИТЕ плиииииииз​

Answer 1

1)

$\frac{12}{19} - ( \frac{5}{19} + \frac{4}{19} ) \\ \frac{12}{19} - \frac{9}{19} \\ \frac{3}{19}$

2)

$\frac{48}{90} + \frac{15}{90} - \frac{39}{90} \\ \frac{24}{90} = \frac{12}{45} = \frac{4}{15}$