Question

номер 43.например так делать :9 x*16=(9*16)*x=144x.

Answer 1

1)
(2*7*5)*a*b = 70ab
(15*4*3)*c*d = 180cd
(7*8*5)*m*n  = 280mn
2)
(8*3*125)*x*y = 3000xy
(5*6*20)*m*n = 600mn
(4*9*25)*a*b = 900ab
3)
(5*9*4)*a*b = 180ab
(12*2*3)*c*d = 72cd
(125*7*8)*m*n = 7000mn