Реши примеры: 1)(2/3-1/2): 5/6= 2)3 1/6-1 2/3+1/2= 3)(3/4+5/6): (-0,5)=

1) (2/3-1/2):5/6= 2*2/3-3*1/2=4/6-3/6=1/6:5/6= 1/6*6/5=1/5
2) 3 1/6-1 2/3+1/2= 19/6-2*5/3+3*1/2=19/6-10/6+3/6=19/6-13/6=6/6=1
3)(3/4+5/6)/(-0,5)=6*3/4+4*5/6=18/24+20/24=38/24=19/12:(-5/10)=19/12:(-1/2)= 19/12*(-2/1)=19/6*(-1/1)=-19/6= -3 1/6