a) [tex]-\frac{3}{4} + (-\frac{3}{4} )= -\frac{3}{4} -\frac{3}{4}=-\frac{6}{4} =-1,5[/tex]
b) [tex]-1 -(-\frac{4}{7} ) = -1 + \frac{4}{7} = -\frac{7}{7}+ \frac{4}{7} = -\frac{3}{7}[/tex]
c) [tex]-0,75+\frac{1}{4} = - \frac{3}{4} +\frac{1}{4} = -\frac{2}{4} = -\frac{1}{2}[/tex]
d) [tex]-2:(7-11) = \frac{-2}{(7-11)} = \frac{-2}{-4} = \frac{1}{2}[/tex]
e) [tex](-2)*3+45:(-32)= -6-\frac{45}{32} = -6-1\frac{13}{32} =-7\frac{19}{32}[/tex]
f) [tex](-8+4)/3*6/(-1+3)= \frac{(-8+4)}{3} * \frac{6}{(-1+3)} = \frac{-4}{3} *\frac{6}{2} = \frac{-4}{3} * 3 = \frac{-12}{3} = -4[/tex]
g) [tex](3-5)3/(4-(-6))-(2*(7-9))/(3:6) = \frac{(3-5)3}{(4-(-6))} - \frac{2*(7-9)}{3:6} = \frac{(-2)*3}{10} - \frac{2*(-2)}{\frac{1}{2} } = \frac{-6}{10} - \frac{-4}{\frac{1}{2} } = \frac{-6}{10} - (-4 *2) = \frac{-6}{10} -(-8) = \frac{-6}{10} + 8 = \frac{74}{10} = 7,4[/tex]
