c)
[tex](1\frac19 - 1\frac14)*(2,2+\frac15)=(\frac{10}9-\frac54)*(2\frac15+\frac15)=(\frac{40}{36}-\frac{45}{36})*2\frac25=-\frac5{36}*\frac{12}5=-\frac{12}{36}=-\frac{3}{9}=-\frac13[/tex]
d)
[tex](4,25+1\frac38):(1\frac23-1\frac14)=(4\frac14+1\frac38):(1\frac{8}{12}-1\frac{3}{12})=(4\frac28+1\frac38):\frac5{12}=5\frac58*\frac{12}5=\frac{45}8*\frac{12}5=\frac98*12=\frac92*3=\frac{27}2=13\frac12=13,5[/tex]
e)
[tex](-3,8+2\frac8{15})*(-\frac3{38})-(-\frac7{30})=(-3\frac45+2\frac8{15})*(-\frac3{38})-(-\frac7{30})=(-3\frac{12}{15}+2\frac8{15})*(-\frac3{38})-(-\frac7{30})=-\frac{19}{15}*(-\frac3{38})-(-\frac7{30})=\frac{1}{10}-(-\frac7{30})=\frac1{10}+\frac{7}{30}=\frac3{30}+\frac7{30}=\frac{10}{30}=\frac13[/tex]
f)
[tex]1-(-\frac27)+1\frac1{13}*(1\frac3{14}-2\frac17)=1-(-\frac27)+\frac{14}{13}*(\frac{17}{14}-\frac{15}{7})=1-(-\frac27)+\frac{14}{13}*(\frac{17}{14}-\frac{30}{14})=1-(-\frac27)+\frac{14}{13}*(-\frac{13}{14})=1-(-\frac27)-1=1+\frac27-1=\frac27[/tex]
