Вычислите : а) 6 1/4* 1 2/5*8 = б ) 3 3/8 * 1/2 / 9/16= в) 3/4 * 1 1/4 *71/2*21.2/71/2 = г) 15/16 /1 1/48 / 2 1/7 / 2

а) 1) 6 1/4 * 1 2/5 = 25/4 * 7/5 = 5/4 * 7/1 = 35/4 = 8 3/4;2) 8 3/4 * 8 = 35/4 * 8/1 = 35/1 * 2/1 = 70/1 = 70.Ответ: 70.б) Наверно должно быть так: 3 3/8 * 1/2 : 9/16.1) 3 3/8 * 1/2 = 27/8 * 1/2 = 27/16 = 1 11/16;2) 1 11/16 : 9/16 = 27/16 * 16/9 = 3/1 * 1/1 = 3/1 = 3.Ответ: 3.в) 1) 3/5 * 1 1/4 = 3/5 * 5/4 = 3/1 * 1/4 = 3/4;2) 3/4 * 71/2 = 213/8 = 26 5/8;3) 26 5/6 * ?.Ответ: 26 5/8.г) 1) 15/16 : 1 1/48 = 15/16 : 49/48 = 15/16 * 48/49 = 15/1 * 3/49 = 45/49;2) 45/49 : 2 1/7 = 45/49 : 15/7 = 45/49 * 7/15 = 3/7 * 1/1 = 3/7;3) 3/7 : 2 2/49 = 3/7 : 100/49 = 3/7 * 49/100 = 3/1 * 7/100 = 21/100;4) 21/100 : 24/125 = 21/100 * 125/24 = 7/4 * 5/8 = 35/32 = 1 3/32.Ответ: 1 3/32.