2целых7/9x15= 28x1целая3/4= 1ц3/5x2ц1/2= 3ц1/2x3/5= 3ц1/3:30= 6:1ц1/2= 1ц3/4:10ц1/2= 5ц/1/5:13/15=

а) 2 7/9 * 15/1 = 25/9 * 15/1 = 25/3 * 5/1 = 125/3 = 41 2/3.Ответ: 41 2/3.б) 28/1 * 1 3/4 = 28/1 * 7/4 = 7/1 * 7/1 = 49/1 = 49.Ответ: 49.в) 1 3/5 * 2 1/2 = 8/5 * 5/2 = 4/1 * 1/1 = 4/1 = 4.Ответ: 4.г) 3 1/2 * 3/5 = 7/2 * 3/5 = 21/10 = 2 1/10.Ответ: 2 1/10.д) 3 1/3 : 30/1 = 10/3 * 1/30 = 1/3 * 1/3 = 1/9.Ответ: 1/9.е) 6/1 : 1 1/2 = 6/1 : 3/2 = 6/1 * 2/3 = 2/1 * 2/1 = 4/1 = 4.Ответ: 4.ж) 1 3/4 : 10 1/2 = 7/4 : 21/2 = 7/4 * 2/21 = 1/2 * 1/3 = 1/6.Ответ: 1/6.з) 5 1/5 : 13/15 = 26/5 * 15/13 = 2/1 * 3/1 = 6/1 = 6.Ответ: 6.