Question

Scoateți factorul comun si efectuați:
a) 17•12+17•18
b) 45•22+22•55
c) 24•156+24•31-24•87
d) 511•22+489•22
e) 67•377+377•33
f)12•13-13•2+13•90

Answer 1

17(12+18)=17x30=510
22(45+55)=22x100=2200
24(156+31-87)=24x100=2400
22(511+489)=22x1000=22000
377(67+33)=377x100=37700
13(12-2+90)=13x100=1300

Answer 2

a)17(12+18)=17×30=510
b)22(45+55)=22×100=2200
c)24(156+31-87)=24×(187-87)=24×100=2400
d)22(511+489)=22×1000=22000
e)377(67+33)=377×100=37700
f)13(12-2+90)=13×100=1300