Question

Doar Exercițiul 4
Rotunjiți la a doua zecimala calcului {[1,(3)la puterea a doua +0,2(6)ori1,5}:2,8

Answer 1

$\{[1 \c{} \: ( \: 3\ )] {}^{2} + 0 \: \c{} \: \: 2(6)\cdot1 \: \c{} \: 5\} : 2 \: \c{} \: 8 \\ \\ = \ \: [( \: \: \frac{12}{9} \ \: ) {}^{ {}^{2} } + \frac{\not24}{\not90} \cdot \frac{\not3}{\not2} \ ] : \frac{14}{5} \\ \\ = \ \ \: [( \frac{4}{3} ) {}^{ {}^{ 2} } + \frac{12}{30} \ \: ] \times \frac{5}{14} \\ \\ = ( \frac{16}{9} + \frac{2}{5} ) \times \frac{5}{14} \\ \\ = ( \frac{80 + 18}{45} ) \times \frac{5}{14} \\ \\ = \frac{\not98}{\not45} \times \frac{\not5}{\not14} \\ \\ = \frac{7}{9} \\ \\ = 0 \: \c{} \: (7) \\ \\ = {0 \: \c{} \: 77...} \: \sim\boxed{ 0 \: \c{} \: 78}$