Question

Calculați folosind factorul comun :
a) 2×55+2×45 ;
b) 45+45×3-45×4 ;
c) 23×16-16×23 ;
d) 3×35-3×17+18×5 .​

Answer 1

a) 2(55+45)=2×100=200

b)45(1+3-4)=45×0=0

c)16(23-23)=16×0=0

d)3(35-17+6×5)=3(18+30)=3×48=144