Malinochka1996 2/1:1/4+( 1 1/2+2 2/3):3 3/4- 2/3
2/1*4/1+(3/2+8/3):3 3/4-2/3
8+(9/6+16/6):15/4-2/3
8+25/6*4/15-2/3
8+10/9-2/3
72/9+10/9-6/9=76/9=8цел 4/9