(1/8+2/9-1/4)*51/7:(7/9-3/2+1/6)

(1/8+2/9-1/4)*5 1/7:(7/9-2/3+1/6)= 1 целая 4/5

1) 1/8+2/9=(1*9+2*8)/72=(9+16)/72=25/72

2) 25/72-1/4=(25*1-1*18)/72=7/72

3) 7/72*5 1/7=7/72*36/7=1/2

4) 7/9-2/3=(7*1-2*3)/9=1/9

5)1/9+1/6=(1*2+1*3)/18=5/18

6)1/2: 5/18=1*18/2*5=18/10=9/5=1 целая 4/5

Пошаговое объяснение:

- 51/40