[tex]1a)\\\\\frac{1}{2}*4^2:8= \frac{1}{2}*\not{16}^2*\frac{1}{\not{8}^1}=\frac{1}{\not{2}^1}*\not{2}^1=1\\\\b)\\\\( \frac{1}{2})^2* \frac{1}{8}*4=\frac{1}{\not{4}^1}*\frac{1}{8}*\not{4}^1=\frac{1}{8}\\\\c)\\\\8: 4*( \frac{1}{2})^2=8*\frac{1}{4} *\frac{1}{4}=\not{8}^1*\frac{1}{\not{16}^2}=\frac{1}{2}\\\\d)\\\\(8:4)^2 *\frac{1}{2}=2^2*\frac{1}{2}=\not{4}^2*\frac{1}{\not{2}^1}=2[/tex]
[tex]2a)\\\\\frac{3}{4}+0,75*1\frac{1}{3}=\frac{3}{4}+ \frac{\not{75}^{25}}{\not{100}^{25}}* \frac{\not{4}^1}{\not{3}^1}=\frac{3}{4}+\frac{25}{25}=\frac{3}{4}+1=1\frac{3}{4}\\\\b)\\\\3,7-1,2 :\frac{1}{2}=3,7-1,2*\frac{2}{1}=3,7-2,4=1,3\\\\c)\\\\5*0,3+3* \frac{2}{5}=1,5+\frac{6}{5}=1,5+1,2=2,7\\\\d)\\\\1,2: \frac{1}{3}-1,4*\frac{2}{7}=1,2* \frac{3}{1}-\frac{\not{14}^2}{\not{10}^5}*\frac{\not{2}^1}{\not{7}^1}=3,6-\frac{2}{5}=3,6-0,4=3,2[/tex]
