Алфавит33 1)

2)

3)

grigopiy

5/8 + 5/6 + 7/12 =  30/48 + 40/48 + 28/48 = 98/48 =2 2/48 = 2 1/24

1/5 + 3/8 - 2/9 = 72/360 + 135/360 - 80/360 = 127/360

1/4 + 2/9 -5/36 = 9/36 + 8/36 - 5/36 = 12/36 = 1/3