0.5*(258.3-180.5)+0.05*7.41-(10.8+2.4)*0.1=по действіям і в столбік

1. (258.3-180.5)=77.8 2. 0.05*7.41=0.3705 3. (10.8+2.4)=13.2 4. 0.5*77.8+0.3705-13.2*0.1 5. 38.9+0.3705-(13.2*0.1) 6. 38.9+0.3705-1.32 Ответ: 37.9505