👤

Efectuati : Ofer coroana + 35 puncte !!

* = Ori [Inmultire]
/ = Supra [Fractie]

[(7/15 + 1/3 - 1/5)* 5/4 + (1/2 - 1/4) : 5/12] * 2/7


Răspuns :

[ ( 7/15 + 1/3 - 1/5) × 5/4 + ( 1/2 - 1/4 ) : 5/12 ] ×2/7 = 
= [ ( 7/15 + 5 /15 - 3/15 ) ×5/4 + ( 2/4 - 1/4 ) : 5/12 ] × 2/7 = 
= ( 9/15 × 5/4 + 1/4 × 12/5 ) × 2/7 = 
= ( 3/4 + 3/5 ) × 2/7 = 
= ( 15/20 + 12/20 ) × 2/7 = 
= 27 /20  × 2/7 = 
= 27 /70