Răspuns :
Răspuns:
17·12+17·18=17·(12+18)=17·30=510
45·22+22·55==22·(45+55)=22·100=2200
511·22+489·22=22·(511+489)=22·1000=22000
67·377+377·33=377·(67+33)=377·100=37700
Explicație pas cu pas:
a)
17×12+17×18=
17×(12+18)=17×30=510
d)
511×22+489×22=
22×(511+489)=22×1 000=22 000
b)
45×22+22×55=
22×(45+55)=22×100=2 200
c)67×377+377×33=
377×(67+33)=377×100=37 700