Решите плиз плиз решите

Решите задачу:

$3\frac{1}{3}\cdot6-5.5\cdot2\frac{5}{11}=\frac{10}{3}\cdot6-5.5\cdot\frac{27}{11}=20-13.5=6.5$

$1\frac{2}{3}:5+0.175\cdot\frac{20}{7}=\frac{5}{3}\cdot \frac{1}{5}+\frac{3.5}{7}= \frac{1}{3}+ \frac{1}{2}=\frac{2}{6}+ \frac{3}{6}= \frac{5}{6}$

$1.75-1\frac{11}{17} \cdot\frac{51}{56} =1.75-\frac{28}{17} \cdot\frac{51}{56} =1.75-\frac{28}{17} \cdot\frac{51}{56} =1.75-1.5=0.25$

$(0.3-\frac{3}{20} )\cdot1\frac{1}{2} =(\frac{3}{10}-\frac{3}{20} )\cdot\frac{3}{2} =(\frac{6}{20}-\frac{3}{20} )\cdot\frac{3}{2} =\frac{3}{20} \cdot\frac{3}{2} =\frac{9}{40}$