Răspuns:
a) [tex]\frac{36}{15}[/tex]
b) [tex]\frac{17}{12}[/tex]
c) [tex]-\frac{71}{40}[/tex]
Explicație pas cu pas:
a)
[tex]1\frac{2}{3} + \frac{11}{15} = \frac{5}{3} +\frac{11}{15} = \frac{5*5 + 11}{15} = \frac{25+11}{15} = \frac{36}{15}[/tex]
b)
[tex]2\frac{1}{4} + (-\frac{5}{6} ) = \frac{9}{4} - \frac{5}{6} = \frac{9*3-5*2}{12} = \frac{27-10}{12} = \frac{17}{12}[/tex]
c)
[tex](-\frac{3}{8} ) + (-1\frac{2}{5} ) = -\frac{3}{8} - \frac{7}{5} = \frac{-3*5 - 7*8}{40} = \frac{-15-56}{40} = -\frac{71}{40}[/tex]
