[tex]1)\\\\ 5\frac{1}{2}+3\frac{1}{4}: \frac{1}{4}+2\frac{1}{2} :5=5\frac{1}{2}+ \frac{13}{\not{4}^1}*\frac{\not{4}^1}{1}+ \frac{\not{5}^1}{2}*\frac{1}{\not{5}^1}=5\frac{1}{2}+13+\frac{1}{2}=19\\\\2)\\\\(5:1\frac{2}{3} +6\frac{1 }{2} ) *2=(5: \frac{5}{3} + 6\frac{1}{2} ) *2=(\not{5}^1* \frac{3}{\not{5}^1} + 6\frac{1 }{2} ) *2= (3+6\frac{1}{2})*2=\\\\=9\frac{1}{2}*2=\frac{19}{\not{2}^1}*\not{2}^1=19[/tex]
