Cześć ;-)
Obliczenia (gdy na początku jest 4 ²/₁₅
[tex]4\frac{2}{15}-(3\frac{7}{9}-1\frac{2}{3})\cdot\frac{4}{5}=4\frac{2}{15}-(3\frac{7}{9}-1\frac{6}{9})\cdot\frac{4}{5}=\\\\=4\frac{2}{15}-2\frac{1}{9}\cdot\frac{4}{5}=4\frac{2}{15}-\frac{19}{9}\cdot\frac{4}{5}=4\frac{2}{15}-\frac{76}{45}=\\\\=4\frac{6}{45}-1\frac{31}{45}=3\frac{51}{45}-1\frac{31}{45}=2\frac{20}{45}=2\frac{4}{9}[/tex]
Obliczenia (gdy na początku jest -4 ²/₁₅)
[tex]-4\frac{2}{15}-(3\frac{7}{9}-1\frac{2}{3})\cdot\frac{4}{5}=-4\frac{2}{15}-(3\frac{7}{9}-1\frac{6}{9})\cdot\frac{4}{5}=\\\\=4\frac{2}{15}-2\frac{1}{9}\cdot\frac{4}{5}=-4\frac{2}{15}-\frac{19}{9}\cdot\frac{4}{5}=-4\frac{2}{15}-\frac{76}{45}=\\\\=-4\frac{6}{45}-1\frac{31}{45}=-5\frac{37}{45}[/tex]
Pozdrawiam!
