Răspuns:
1/9
Explicație pas cu pas:
[(³⁾3/8 + ²⁾5/12)·1/19 + (1/2)²] : 2 5/8 =
= [(9+10)/24 · 1/19 + 1/4 ] : (2·8+5)/8 =
= (19/24 · 1/19 + 1/4) : (21/8) =
= (1/24 + ⁶⁾1/4) · 8/21 =
= (1+6)/24 ·8/21 = 7/24 · 8/21 = 7·8 / (24·21) =
= 1/(3·3) = 1/9
#copaceibrainly