Question

Pls..nush cum sa calculez media aritmetica la punctul "c" :P

Answer 1

pe cel din mijloc nush cum se face

Answer 2

transformam fractiile periodice in fractii ordinare

2,(3)=23-3/9=20/9

0,1(3)=13-1/90=12/90

le aducem la acelasi numitor

$\frac{20}{9} = \frac{20 \times 10}{9 \times 10} = \frac{200}{90}$

$\frac{12}{90} = \frac{12}{90}$

$\frac{3}{5} = \frac{3 \times 18}{5 \times 18} = \frac{54}{90}$

le calculam media aritmetica

$\frac{ \frac{12}{90} + \frac{200}{90} + \frac{54}{90} } {3} = \frac{ \frac{266}{90} }{3} = \frac{266}{90} \times \frac{1}{3} = \frac{266}{270}$