a)  $-0,64:\frac{2}{5}+1=-0,64:0,4+1=-6,4:4+1=-1,6+1=-0,6$  

$0,16\cdot \left(-\frac{1}{5}\right)-1=\frac{16}{100}\cdot \left(-\frac{1}{5}\right)-1=-\frac{16}{500}-1=-1\frac{16}{500}=-1\frac{32}{1000}=-1,032$  

$-0,6>-1,032$  

b)  $\left(3-\frac{2}{7}\cdot 3,5\right):\left(-2\right)=\left(3-\frac{2}{7}\cdot \frac{35}{10}\right):\left(-2\right)=\left(3-\frac{70}{70}\right):\left(-2\right)=\left(3-1\right):\left(-2\right)=2:\left(-2\right)=-1$

$\frac{4}{9}:\left(-2\frac{2}{3}\right)-\left(-1\frac{5}{12}\right)\cdot \left(-3\right)=\frac{4}{9}:\left(-\frac{8}{3}\right)-\left(-\frac{17}{12}\right)\cdot \left(-3\right)=\frac{4}{9}\cdot \left(-\frac{3}{8}\right)-\frac{51}{12}=\left(-\frac{12}{72}\right)-\frac{51}{12}=-\frac{12}{72}-\frac{306}{72}=-\frac{318}{72}=-4\frac{30}{72}=-4\frac{15}{36}=-4\frac{5}{12}$  

$-1>-4\frac{5}{12}$   349:(-223