12 6 3 x =- 7 5 July 8, 2019 16 32 64 128 12 6 5 * 3 x 2 * 2 1 7 2 )= 12 5x 2 )+ 6 =- 29 3 x 7 5 3 x 7 12 chia 5 6 5 x 7 = 35 12 6 x 3 4 12 x 7/6