Question

EFECTUATI -1/5+(-3/10)+ (-7/15)+(+19/20) =.

Answer 1

Răspuns:

Explicație pas cu pas:

$- \frac{1}{5} + \Big( - \frac{3}{10} \Big) + \Big( - \frac{7}{15 } \Big) + \Big( + \frac{19}{20} \Big)$

$= - \frac{ {}^{12)} 1}{5} - \frac{ {}^{6)} 3}{10} - \frac{ {}^{4)} 7}{15} + \frac{ {}^{3)} 19}{20}$

$= \frac{ - 12 - 18 - 28 + 57}{60} = \boxed{ - \frac{1}{60} }$

Answer 2

Răspuns:

   

Explicație pas cu pas: