25×87+25×93=25×(87+93)=25×180=4500
110×93-110×64=110×(93-64)=110×29=3190
39×76+39×128=39×(76+128)=39×204=7956
75×208-75×128=75×(208-128)=75×80=6000
324×15+324×25=324×(15+25)=324×40=12960
Sau se efectueaza fiecare inmultire in parte, apoi adunarea/scaderea.
