Помогите решить примеры 1 1/2 +2 2/4 4 -2 1/4 7 -1 2/3 2 1/3-1 1/2 2 2/7 -1 3/5

11/2+2 2/4=22/4+10/4=(22+10)/4=2/4=1/2 4-2 1/4=16/4-9/4=(16-9)/4=7/4=1 3/4 7-1 2/3=21/3-5/3=16/3=5 1/3 2 1/3-1 1/2=14/6-9/6=5/6 2 2/7-1 3/5=80/35-56/35=24/35

1 1/2 + 2 2/4 = 1 2/4 + 2 2/4 = 3 4/4 = 4 4 - 2 1/4 = 3 4/4 - 2 1/4 = 1 3/4 7 - 1 2/3 = 6 3/3 - 1 2/3 = 5 1/3 2 1/3 - 1 1/2 = 2 2/6 - 1 3/6 = 1 8/6 - 1 3/6 = 5/6 2 2/7 - 1 3/5 = 2 10/35 - 1 21/35 = 1 45/35 - 1 21/35 = 24/35