evaluate 3 7/8 + 1 3/4

3 7/8 + 1 3/4

= 3 7/8 + 1 6/8
= 4 13/8
= 4 + 1 5/8
= 5 5/8
or
31/8 + 7/4
= 31/8 + 14/8
= 45/8
= 5 5/8