(4 7/8 + 2 5/ 1/8 - 3 3/8) позязя с:

7 4/8 - 1 6/8 = 60/8 - 14/8 = 46/8 = 5 3/4

1) 4 7/8  +  2 5/8 = 39/8  +  21/8 = (39  +  21)/8 =  60/8 = 15/2 = 7 1/2
2) 5 1/8  -  3 3/8 = 41/8  -  27/8 = (41  -  27)/8 =  14/8 = 7/4 = 1 3/4
3) 7 1/2  -  1 3/4 = 15/2  -  7/4  =(15 × 2  -  7 × 1)/4 = 30 / -  7/4 =  23/4 = 5 3/4
ответ 5 3/4