Решение задания 1

1. a) -28 + 12 - 7 = -16 - 7 = <strong>-23</strong>

2. б) -8,8 + 6,5 - 1,6 = -2,3 - 1,6 = <strong>-3,9</strong>

3. в) ($$\frac{2}{3}-\frac{4}{9}$$) $$\cdot$$ $$\frac{3}{8}$$ = ($$\frac{6}{9}-\frac{4}{9}$$) $$\cdot$$ $$\frac{3}{8}$$ = $$\frac{2}{9} \cdot \frac{3}{8}$$ = $$\frac{2 \cdot 3}{9 \cdot 8}$$ = $$\frac{6}{72}$$ = $$\frac{1}{12}$$ = <strong>$$\frac{1}{12}$$</strong>