Question

Ajutatima va rog cu acest exercitiu

6,5*(1,2-4,(3))-9,9:3+7,4*5-450

mai sus poza din carte daca nu intelegeti.

Answer 1

$6,5\cdot (1,2-4,(3))-\frac{9,9}{3}+7,4\cdot 5-450=$
$6,5\cdot (\frac{12}{10}-\frac{43-4}{9})-\frac{9,9}{3}+7,4\cdot 5-450=$
$6,5\cdot (\frac{6}{5}-\frac{13}{3})-\frac{9,9}{3}+7,4\cdot 5-450=$
$\frac{65}{10}\cdot \frac{18-65}{15}-\frac{4163}{10}=$
$\frac{-3055-62445}{150}=$
$\frac{-65.500}{150}=$
$\frac{-65.50}{15}=$
$\frac{-1310}{3}$

Valoarea exacta este -436,(6).