а) 1/12 + 0,25 = 1/12 + 25/100 = 1/12 + 1/4 = (1*4 + 12)/48 = 16/48 = 1/3
б) 5/6 - 0,5 = 5/6 - 50/100 = 5/6 - 1/2 = (53 - 61)/6 = 9/6 = 3/2
в) 0,8 - 2/3 = 8/10 - 2/3 = 24/30 - 20/30 = (24 - 20)/30 = 4/30 = 2/15
а) 1/12 + 0,25 = 1/12 + 25/100 = 1/12 + 1/4 = (1*4 + 12)/48 = 16/48 = 1/3
б) 5/6 - 0,5 = 5/6 - 50/100 = 5/6 - 1/2 = (53 - 61)/6 = 9/6 = 3/2
в) 0,8 - 2/3 = 8/10 - 2/3 = 24/30 - 20/30 = (24 - 20)/30 = 4/30 = 2/15