А) 3/8 + 5/12 = 9/24 + 10/24 = 19/24
Б) 9/20 - 3/8 = 9/20 - 15/40 = 18/40 - 15/40 = 3/40
В) 14/18 + 2/9 - 5/18 = 28/36 + 8/36 - 10/36 = 26/36 = 13/18
Г) 3 7/15 + 4.6 = 3 + 7/15 + 46/10 = 3 + 14/30 + 138/30 = 3 + 152/30 = 3 2/3
Д) y - 27/30 = 1/15 + 16/60 = 1/15 + 4/15 = 5/15 = 1/3y = 27/30 + 1/3 = 27/30 + 10/30 = 37/30 = 1 7/30.
А) 3/8 + 5/12 = 9/24 + 10/24 = 19/24
Б) 9/20 - 3/8 = 9/20 - 15/40 = 18/40 - 15/40 = 3/40
В) 14/18 + 2/9 - 5/18 = 28/36 + 8/36 - 10/36 = 26/36 = 13/18
Г) 3 7/15 + 4.6 = 3 + 7/15 + 46/10 = 3 + 14/30 + 138/30 = 3 + 152/30 = 3 2/3
Д) y - 27/30 = 1/15 + 16/60 = 1/15 + 4/15 = 5/15 = 1/3
y = 27/30 + 1/3 = 27/30 + 10/30 = 37/30 = 1 7/30.