a) -1,7+0,9=-0,8 18+(-20,7)=-2,7 -2,7+(-3,6)=-6,3 -3,4-(-1,5)=-1,9
b)
[tex]\frac{1}{4} -\frac{1}{2} /x2=\frac{1}{4} -\frac{2}{4} =-\frac{1}{4} \\\\-\frac{7}{12} + \frac{3}{8} = -\frac{7}{12} /x2+ \frac{3}{8}/x3=-\frac{14}{24} + \frac{9}{24}=-\frac{5}{24}\\\\-3\frac{1}{5} -2\frac{1}{2} =-3\frac{1}{5}/x2 -2\frac{1}{2}/x5=-3\frac{2}{10}-2 \frac{5}{10} = -\frac{7}{10}\\\\1\frac{1}{6} -(-2\frac{1}{12} )=1\frac{1}{6}/x2 -(-2\frac{1}{12} )=1\frac{2}{12} -(-2\frac{1}{12} )=-1\frac{1}{12}[/tex]
c)
[tex]3,7-4\frac{2}{5} =3\frac{7}{10} -4\frac{2}{5}=3\frac{7}{10} -4\frac{2}{5} /x2 =3\frac{7}{10} -4\frac{4}{10}=-1\frac{3}{10}\\\\ -\frac{7}{8} +(-0,7)=-\frac{7}{8} +(-\frac{7}{10} )=-\frac{7}{8} /x5 +(-\frac{7}{10} ) /x4 =-\frac{35}{40} +(-\frac{28}{40} )=-\frac{63}{40} =1\frac{23}{40}\\\\ 1,4-(-1\frac{3}{4} )=1\frac{4}{10} -(-1\frac{3}{4} )=1\frac{4}{10} /x2 -(-1\frac{3}{4} ) /x5 =1\frac{8}{20} -(-1\frac{15}{20} )=-1\frac{13}{20}[/tex]
[tex]-2\frac{1}{6} -(-1,6)=-2\frac{1}{6} -(-1\frac{6}{10} )=-2\frac{1}{6}/x5 -(-1\frac{6}{10} )/x3=-2\frac{5}{30} -(-1\frac{18}{30} )=-4\frac{13}{30}[/tex]
przepraszam, że tak długo ale missclickiem usunęłam wszystko co napisałam wcześniej xD
