Пошаговое объяснение:
3 1/14+2 3/7-(-2.85)=43/14+17/7+285/100=2150/700+1700/700+1995/700=
5845/700=8.35
28-3 5/12+(-4.5+2 1/4)=28-41/12+(-45/10+9/4)=336/12-41/12+(-90/20+45/20)=295/12-45/20=1475/60-135/60=1340/60=22 20/60
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Пошаговое объяснение:
3 1/14+2 3/7-(-2.85)=43/14+17/7+285/100=2150/700+1700/700+1995/700=
5845/700=8.35
28-3 5/12+(-4.5+2 1/4)=28-41/12+(-45/10+9/4)=336/12-41/12+(-90/20+45/20)=295/12-45/20=1475/60-135/60=1340/60=22 20/60