Răspuns:
a) [tex]\frac{4*5+ 4}{5} * \frac{8*1+7}{8}[/tex]= [tex]\frac{24}{5} * \frac{15}{8}[/tex]= 3*3= =9 ( se simplifica 24 cu 8 si 15 cu 5)
b) [tex]\frac{3*5+1}{5} *\frac{4*1+3}{4}[/tex]= [tex]\frac{16}{5} *\frac{7}{4}[/tex]= [tex]\frac{28}{5}[/tex]
c) [tex]\frac{10*2+1}{2} * 5[/tex]= [tex]\frac{21*5}{2} = \frac{105}{2}[/tex]
d) 7[tex]*\frac{3*4+1}{4}[/tex]= [tex]7*\frac{13}{4}[/tex]= [tex]\frac{91}{4}[/tex]
