а) 2/3 ÷ 5 = 2/3 ÷ 5/1 = 2/3 * 1/5 = 2/15
б) 3/7 ÷ 21 = 3/7 ÷ 21/1 = 3/7 * 1/21 = 1/49
в) 2/9 ÷ 9 = 2/9 ÷ 9/1 = 2/9 * 1/9 = 2/81
г) 3/8 ÷ 24 = 3/8 ÷ 24/1 = 3/8 * 1/24 = 1/64
а) 2/3 ÷ 5 = 2/3 ÷ 5/1 = 2/3 * 1/5 = 2/15
б) 3/7 ÷ 21 = 3/7 ÷ 21/1 = 3/7 * 1/21 = 1/49
в) 2/9 ÷ 9 = 2/9 ÷ 9/1 = 2/9 * 1/9 = 2/81
г) 3/8 ÷ 24 = 3/8 ÷ 24/1 = 3/8 * 1/24 = 1/64