-25,5-3,4+7,28+25,5+34:10-0,728*10+2,85
-25.5-3.4+7.28+25.5+34:10-0.728*10+2.85=2.85 34:10=3.4 0.728*10=7.28 -25.5-3.4=-28.9 -28.9+7.28=-21.62 -21.62+25.5=3.88 3.88+3.4=7.28 7.28-7.28=0 0+2.85=2.85