14 1/2 -(3 7/8 +5 2/3)+1 1/4 cрочно

 

14 1/2 -(3 7/8 +5 2/3)+1 1/4 = 6 1/41)  3 7/8 + 5 2/3 = (3+5)+(7/8+2/3)= 8 + (7*3+2*8/24)= 8+(21+16/24)= 8+36/24 = 9 12/24 = 9 1/22) 14 1/2 - 9 1/2 = 53) 5 + 1 1/4 = 6 1/4

по действиям 1)3 7/8+5 2/3=3 21/24+5 16/24=8 37/24=9 13/242)14 1/2-9 13/24=14 12/24-9 13/24=13 36/24-9 13/24=4 23/243)4 23/24+1 1/4=4 23/24+1 6/24=5 29/24=6 5/24