1 минус четыре двенадцатых
1 – 4/12 = 1 – 1/3 = 2/3
1 – 4/12 = 1 – 1/3 = 2/3 ИЛИ 1 – 4/12 = 12/12 – 4/12 = 8/12 = 2/3
1=12\12 12\12-4\12=8\12=2\3