A) -1/4-(1cała i3/10+1/5):2/3*3= -1/4(30/10+1/5):2=-1/4*(30/10+2/10):2= (-1/4*32/10):2 =-32/40*1/2=-16/40= -2/5
b) 6:(1 cała 1/2):2+(-5całych2/5)+4całe 4/5 = (1/6*3/2):(-3/5)= 1/4*(5/3)=-5/12
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A) -1/4-(1cała i3/10+1/5):2/3*3= -1/4(30/10+1/5):2=-1/4*(30/10+2/10):2= (-1/4*32/10):2 =-32/40*1/2=-16/40= -2/5
b) 6:(1 cała 1/2):2+(-5całych2/5)+4całe 4/5 = (1/6*3/2):(-3/5)= 1/4*(5/3)=-5/12