a) [tex]-\frac{3}{4} + (-8\frac{4}{8} ) + (-6\frac{5}{6} )+ (-1\frac{3}{8} ) =[/tex]
[tex]= -\frac{3}{4} - \frac{64+4}{8} -\frac{36 + 5}{6} - \frac{8+3}{8} =[/tex]
[tex]= -\frac{3}{4} -\frac{68}{8} -\frac{41}{6} -\frac{11}{8} =[/tex]
[tex]= -\frac{18}{24} -\frac{204}{24} -\frac{164}{24} -\frac{33}{24} =[/tex]
[tex]= -\frac{222}{24} -\frac{197}{24} =[/tex]
[tex]= -\frac{219}{24}[/tex]
b) [tex]-14\frac{1}{2} + (-7\frac{3}{5} )+8\frac{1}{5} + (-6,3) =[/tex]
[tex]= -\frac{18+1}{2} - \frac{35 + 3}{5} + \frac{40 +1}{5} -\frac{63}{10} =[/tex]
[tex]= -\frac{19}{2} - \frac{38}{5} + \frac{41}{5} - \frac{63}{10} =[/tex]
[tex]= -\frac{95}{10} -\frac{76}{10} +\frac{82}{10} -\frac{63}{10} =[/tex]
[tex]= -\frac{171}{10} +\frac{19}{10} =[/tex]
[tex]= -\frac{152}{10} = 15,2[/tex]
c) [tex]20 + (-16,3) + 4\frac{1}{3} + (-18\frac{2}{3} )=[/tex]
[tex]= \frac{200}{10} -\frac{163}{10} + \frac{12 +1}{3} -\frac{36 + 2}{3} =[/tex]
[tex]= \frac{600}{30} -\frac{489}{30} +\frac{130}{30} -\frac{380}{30} =[/tex]
[tex]= \frac{111}{30} -\frac{250}{30} =[/tex]
[tex]= -\frac{139}{30}[/tex]
d) [tex]-0,6 +2\frac{3}{8} + (-7 \frac{5}{8} )+ (-\frac{1}{2} )+0 =[/tex]
[tex]= \frac{6}{10} +\frac{12+3}{8} -\frac{56+5}{8} -\frac{1}{2} =[/tex]
[tex]= \frac{24}{40} +\frac{75}{40}-\frac{305}{40}-\frac{20}{40}=[/tex]
[tex]= \frac{99}{40} -\frac{325}{40} =[/tex]
[tex]= -\frac{226}{40}[/tex]
