Question

resolva a expressão 13/5 + 3/8 - √1,21:

Answer 1

13/5 + 3/8 - √1,21 =
108/40 + 15/40 - 40√1,21/40 =
108+14-40√1,21/40 =
122 -40.1,1/40 =
122 - 44/40 =
78/40 simplificando por 2 = 39/20

Answer 2

$= \frac{13}{5} + \frac{3}{8} - \sqrt{1,21}$
$= \frac{13}{5} + \frac{3}{8} -1.1$
$= \frac{13}{5} + \frac{3}{8} - \frac{11}{10}$
$= \frac{13*8+3*5-11*4}{40}$
$= \frac{104+15-44}{40}$
$= \frac{ 75}{40}$
$= \frac{ 15}{8}$