а) 3 * 1/6 б)2/5 * 15 в) 5 * 1/5 г)6*3/4

а) 3 * 1/6 = 3/6 = 1/2 = 0,5б) 2/5 * 15 = 30/5 = 6в) 5 * 1/5 = 5/5 = 1г) 6 * 3/4 = 18/4 = 4 2/4 = 4 1/2 = 4,5