Răspuns:
a.17/5; b.17/4; c.15/8
Explicație pas cu pas:
a.
[tex]3-2(-\frac{1}{5} )=3+\frac{2}{5}=\frac{3*5+2}{5}=\frac{17}{5}[/tex]
b.
[tex]5+3(-\frac{1}{4})=5-\frac{3}{4} =\frac{5*4-3}{4} =\frac{17}{4}[/tex]
c.
[tex]\frac{3}{2} -\frac{3}{4} (-\frac{1}{2} )=\frac{3}{2} +\frac{3*1}{4*2} =\frac{3*4+3}{8} =\frac{15}{8}[/tex]
