5 x 15 2 July 8, 2019 16 32 64 128 5 x 15 /- 20 5 x 15 27 5 x 15 21 5 x 15 25 5 x 15 22 5 15 x 2 3 5 x 2 15 6 5 х 2 15 5 15 х 2 4 X 5 2x 15 X 5 2x )+ 15 0 5 x 2 )- 15 25 5 x 1 )= 15 2 4 5 x 15 2 7 5 x 15 2