6 5 8x 12 July 8, 2019 16 32 64 128 6 5 8x )+ 12 =- 54 6 12x 5 8x .5 8x 6 )= x 12 8 8x 5 ) 6 12x 4 4x 6 12x 5 8x 4 6 8 x 5 6 5×8 6 8×51 6 × 8 6 5+8 6