Zadanie 17:
a)
[tex]-2\frac{1}{3} -(-3\frac{1}{3} )=-2\frac{1}{3} +3\frac{1}{3} =1 \\\\-3,4-7,5=-10,9[/tex]
b)
[tex]-2\frac{1}{2} -(-3,5)=-2\frac{1}{2} +3,5=-2,5+3,5=1\\\\-6\frac{1}{4} -4,5=-6,25-4,5=-10,75[/tex]
c)
[tex]5\frac{1}{6} -7\frac{1}{3} =\frac{31}{6} -\frac{22}{3} =\frac{31}{6} -\frac{44}{6} =-\frac{13}{6} =-2\frac{1}{6} \\\\2\frac{3}{4}-(-1\frac{1}{2} )=2,75+1,5=4,25[/tex]
Zadanie 18:
a)
[tex]1,4-(-2\frac{5}{8} )1,4+2,625=4,025[/tex]
b)
[tex]-3\frac{1}{4} -(-2\frac{1}{3} )=-3\frac{1}{4} +2\frac{1}{3} =-\frac{13}{4} +\frac{7}{2} =-\frac{39}{12} +\frac{28}{12} =-\frac{11}{12}[/tex]
