kitkirit123owttuh 3/4 + 1/4 = 4/4 = 1
1 + 3 6/8 = 4 6/8
3 6/8 - 7/8 = 2 14/8 - 7/8 = 2 7/8
3 - 2 8/8 = 3 - 3 = 0