1) $$2 \frac{3}{8} \cdot 3 \frac{4}{5} =$$ 2) $$16 \frac{3}{16} , \frac{32}{69} = $$

Решение:

1. $$2 \frac{3}{8} \cdot 3 \frac{4}{5} = \frac{2 \cdot 8 + 3}{8} \cdot \frac{3 \cdot 5 + 4}{5} = \frac{19}{8} \cdot \frac{19}{5} = \frac{19 \cdot 19}{8 \cdot 5} = \frac{361}{40} = 9 \frac{1}{40}$$
2. $$16 \frac{3}{16} : \frac{32}{69} = \frac{16 \cdot 16 + 3}{16} : \frac{32}{69} = \frac{259}{16} : \frac{32}{69} = \frac{259}{16} \cdot \frac{69}{32} = \frac{259 \cdot 69}{16 \cdot 32} = \frac{17871}{512} = 34 \frac{463}{512}$$

Ответ:

1. $$9 \frac{1}{40}$$
2. $$34 \frac{463}{512}$$