Odpowiedź:
a) [tex]1,4-2,1-0,9+0,6 = \frac{14}{10} - \frac{21}{10} - \frac{9}{10} +\frac{6}{10} = \frac{14-21-9+6}{10} = \frac{-10}{10} = -1[/tex]
b) [tex]-31 -(-9) = -31+9 = -22[/tex]
c) [tex]-6\frac{1}{3}:(-1\frac{1}{6})=-\frac{19}{3}:(-\frac{7}{6})=-\frac{19}{3}*(-\frac{6}{7}) = -\frac{19}{1}*(-\frac{2}{7}) = \frac{38}{7} = 5\frac{3}{7}[/tex]
d) [tex]\frac{-7-4*(-2)}{-10-5}=\frac{-7+8}{-15}=\frac{1}{-15}=-\frac{1}{15}[/tex]
e) [tex]-(-0,6):(-1,2)-0,6*(-\frac{2}{3} ) = \frac{6}{10}:\frac{12}{10}-\frac{6}{10}*(-\frac{2}{3})= \frac{6}{10}*\frac{10}{12}-\frac{2}{5}*(-\frac{1}{1})= \frac{1}{1}*\frac{1}{2}+\frac{2}{5} =\frac{1}{2}+\frac{2}{5} =\frac{5}{10}+\frac{4}{10}=\frac{9}{10}\\[/tex]
f) [tex]-7\frac{1}{5} -0,8=-7\frac{1}{5} -\frac{8}{10}=-7\frac{2}{10} -\frac{4}{5}=-7\frac{6}{5} = -8\frac{1}{5}[/tex]
g)[tex]-1\frac{1}{3} *(-0,75)-1\frac{1}{3}=-\frac{4}{3} *(-\frac{3}{4})-1\frac{1}{3}=1-1\frac{1}{3}=-\frac{1}{3}\\[/tex]
Szczegółowe wyjaśnienie:
