Выполни умножение 8 9/20×2/13= 10 1/2×2/7= 3 1/9×3/8= 10 1/5×10/17=
8 9/20 * 2/13 = 1 3/10 10 1/2 * 2/7 = 3 3 1/9 * 3/8 = 1 1/6 10 1/5 * 10/17 = 6