4 3 8 x 5 1 12 July 8, 2019 16 32 64 128 1 4 х 8 5 5 12 x 3 25 4 3 5 8 chia x 1 12 4 3 5 phần 8 chia x 1 12 4 + 4 = 12 4 5/8 - 1 3/4 = 4 1/2 + 1 1/3
