я) (11 2/19 - 9 3/19 ) ⋅ 3

я)

1) $$11\frac{2}{19} = \frac{11 \cdot 19 + 2}{19} = \frac{209 + 2}{19} = \frac{211}{19}$$

2) $$9\frac{3}{19} = \frac{9 \cdot 19 + 3}{19} = \frac{171 + 3}{19} = \frac{174}{19}$$

3) $$\frac{211}{19} - \frac{174}{19} = \frac{37}{19}$$

4) $$\frac{37}{19} \cdot 3 = \frac{111}{19} = 5\frac{16}{19}$$

Ответ: 5 16/19