(5⅛-2¼)+(3 7/16-9/8)

1) 5 1/8 - 2 1/4 = 5 1/8 - 2 2/8 = 4+8/8+1/8 - 2 2/8 = 4 9/8 - 2 2/8 = 2 7/8
2) 3 7/16 - 9/8 = 3 7/16 - 1 1/8 = 3 7/16 - 1 2/16 = 2 5/16
3) 2 7/8 + 2 5/16 = 2 15/16 + 2 5/16 = 4 20/16 =4 5/4 = 5 1/4