La propiedad distributiva

(5+10) X 4

(5 X 9) + (6 X 9)

(9 x 7) + (9 x 6)

(4+8) X 3

(4 X 3) + (8 X 3)

(5+6) X 9

(5 x 4) + (10 x 4)

9 X (7 +6)