Răspuns:
ex.2
a) 12×13+12×15+72=
156+180+864=
336+864=1200
b) 125×234-125×28+125×194=
29250-3500+24250=
25750+24250=50000
c)702×256-702×55+702×799=
179712-38610+560898=
141102+560898=702000
d) 1000×372+259×1000-153×1000=
372000+259000-153000=
631000-153000=478000
sper ca te-am ajutat :D
