Задание №2 (вычислите): 1) (3 2/5 · 2 − 5 3/4 : 1 11/12) : 3 1/6 − 4 4/5 : 9 + 2 2/3; 2) [10 − (4,25 · 7,08 + 6,768 : 0,75)] · 2050.

1)

1. \(3\frac{2}{5}\cdot2=\frac{17}{5}\cdot2=\frac{34}{5}\).

2. \(5\frac{3}{4}:1\frac{11}{12}=\frac{23}{4}:\frac{23}{12}=3\).

3. \((\frac{34}{5}-3):3\frac{1}{6}=\frac{19}{5}:\frac{19}{6}=\frac{6}{5}\).

4. \(4\frac{4}{5}:9=\frac{24}{5}:9=\frac{8}{15}\).

5. \(\frac{6}{5}-\frac{8}{15}+2\frac{2}{3}=\frac{18}{15}-\frac{8}{15}+\frac{40}{15}=\frac{50}{15}=\frac{10}{3}\).

Ответ: \(\frac{10}{3}\).

2)

1. \(4,25\cdot7,08=30,09\).

2. \(6,768:0,75=9,024\).

3. \([10-(30,09+9,024)]\cdot2050=(10-39,114)\cdot2050\).

4. \(-29,114\cdot2050=-59683,7\).

Ответ: \(-59683,7\).