pomozcie prosze jutro z tego mam kartkowke (8 2/5 - 5 3/4): 2 13/20 3 1/4*4/26+(1 1/2 - 2/3 (2/5 -0.5 - 4* (- 1/2) do potegi 2) : (-1/2) [0.9* 5/10 - 3] * ( 1/3) do potegi 3 : (- 1/2) prosze pomozcie

(8 i 2/5-5 i 3/4):2 i 13/20=(8 i 8/20-5 i 15/20):53/20= =(7 i 20/20+8/20-5 i 15/20):53/20=2 i 13/20*20/53=53/20*20/53=1 3 i 1/4*4/26+(1 i 1/2-2/3)=13/4*2/13+(1 i 3/6-4/6)=1/2+(6/6+3/6-4/6)= =1/2+5/6=3/6+5/6=8/6=1 i 2/6=1 i 1/3 ((2/5-0,5-4*(-1/2)²:(-1/2)=(2/5-1/2-4*1/4:(-1/2)=(4/10-5/10-1*(-2))= =4/10-5/10+2= -1/10+2=-1/10+1 i 10/10=1 i 9/10 [0,9*5/10-3]*(1/3)³:(-1/2)=[9/10*1/2-3]*1/27:(-1/2)=[9/20-3]*1/27*(-2)= =[9/20-2 i 20/20]*(-2/27)= -2 i 11/20*(-2/27)= -51/20*(-2/27)=51/270= =17/90