№28/35 = 4/8/12 = 2/39/970/112 = 35/56 = 5/40/72 = 5/9
№4/7 + 5/6 = (24 + 35) / 42 = 59/49/20 - 5/12 = (54 - 50) / 240 = 4/240 = 1/65/42 + 9/28 = (20 + 27) / 84 = 47/84
9/20 - 7/24 + 3/10 = (216 - 140 + 72) / 480 = 148/480 = 37/120
№x + 1/12 = 1/3 + 1/x + 1/12 = 4/12 + 3/1x + 1/12 = 7/1x = 6/1x = 1/2
№1/4 + 1/8 = 2/8 + 1/8 = 3/8
№1/6 < 1/7/8 > 7/8
№
28/35 = 4/
8/12 = 2/
39/9
70/112 = 35/56 = 5/
40/72 = 5/9
№
4/7 + 5/6 = (24 + 35) / 42 = 59/4
9/20 - 5/12 = (54 - 50) / 240 = 4/240 = 1/6
5/42 + 9/28 = (20 + 27) / 84 = 47/84
9/20 - 7/24 + 3/10 = (216 - 140 + 72) / 480 = 148/480 = 37/120
№
x + 1/12 = 1/3 + 1/
x + 1/12 = 4/12 + 3/1
x + 1/12 = 7/1
x = 6/1
x = 1/2
№
1/4 + 1/8 = 2/8 + 1/8 = 3/8
№
1/6 < 1/
7/8 > 7/8