Автор - dameli75
Объяснение:
(3/4 -5/8 +1/6)/(3/8 +7/12 -1/2)=(6/8 -5/8 +1/6)/(3/8 +7/12 -2/12)=(3/24 +4/24)/(9/24 +10/24)=7/24 ×24/19=7/19
5+ 4/(2- 1/3)=5+ 4/(6/3 -1/3)=5+ 4×3/5=4 5/5 +2 2/5=7 2/5=7,4
(3+ (1/2 -1/5)/3)/(7- 4/5)=(3+ (0,5-0,2)/3)/(35/5 -4/5)=(3+ 3/30)×5/31=(3+0,1)×5/31=31/10 ×5/31=1/2=0,5
2+ 3/(2-1 1/2)=2+ 3/(4/2 -3/2)=2+3×2/1=2+6=8