Question

(7/7+8/15 ori 3/4):21/10
????????????????????????????? Imi trebuie urgent !!!!!!!!!!!!!!!!

Answer 1

($\frac{7}{7}$+$\frac{8}{15}$·$\frac{3}{4}$):$\frac{21}{10}$
($\frac{7}{7}$+$\frac{8}{15}$·$\frac{3}{4}$) ·$\frac{10}{21}$
Simplificam din paranteza 8 cu 4 si 3 cu 15 =>
($\frac{7}{7}$+$\frac{2}{5}$)·$\frac{10}{21}$
Amplificam in paranteza ca sa avem acelasi numitor (prima cu 5 a 2-a cu 7) si obtinem
($\frac{49}{35}$+$\frac{14}{35}$)·$\frac{10}{21}$
$\frac{63}{45}$·$\frac{10}{21}$=$\frac{6}{7}$