0,5 * (1 целая 1/2 + 2 целых 2/3-1 целая 3/4) - 1 целая 1/24

0.5=5/10=1/2

1 1/2 = (2+1) / 2=3/2

2 2/3 = (6+2) / 3=/8/3

1 3/4 = (4+3) / 4=7/4

1 1/24 = (24+1) / 24=25/24

1) 3/2+8/3 = (3*3+8*2) / (2*3) = (9+16) / 6=25/6

2) 25/6-7/4 = (25*2-7*3) / 12 = (50-21) / 12=29/12

3) 29/12*1/2=29/24

4) 29/24-25/24=4/24=1/6

Ответ: 1/6