1) (-5/12-3/4):2 1/3 +5 1/3*0,75=1/4=0,251)-5/12-3/4=-5/12-9/12=-14/12=-7/6=- 1 1/62)-7/6: 2 1/3 = - 7/6:7/3= -(7*3/6*7)=-1/23)5 1/3 *0,75 =16/3 * 75/100 = 16*75 / 3*100 = 3*3/3*4= 3/44)-1/2+3/4= -2/4+3/4=1/4=0,252)(-2,5-1 5/6): 1 4 /9 -3 5/9 *(- 2 1/4)=51)-2,5-1 5/6=- 25/10 - 11/6=-25*3/30 - 11*5/30=(-75-55)/30=-130/30=-13/32)-13/3: 1 4/9= -13/3* 9/13=-33) 3 5/9* (-2 1/4)= - (32*9/9*4 )=-84)-3-(-8)=-3+8=53) (-3,8+ 2 1/3) * (-1 7/8)+ 4 1/6:(- 1 2/3)=1/4=0,251)-3,8+ 2 1/3 = -38/10+ 7/3 = (-114+70)/30=-44/30=-22/152) -22/15 * (-1 7/8)=22*15/15*8=11/43)4 1/6 : (-1 2/3) = 25/6 : (-5/3)=-(25*3/5*6) = -5*1/1*2=-5/24) 11/4 +(-5/2) = 11/4 - 10/4=1/4=0,25