Question

Помогите плизз.
Реши удобным способом

25×(2×8)=
47×(5×2)=
(50×3)×4=
(5×6)×16=
(18×20)×5=
(7×5)×4=

Answer 1

25*(2*8)=(25*2)*8=50*8=400

47*(5*2)=47*10=470

(50*3)*4=(50*4)*3=200*3=600

(5*6)*16=(5*16)=80*6=480

(18*20)*5=(20*5)*18=100*18=1800

(7*5)*4=(5*4)*7=20*7=140