a) 4/5-2/5*(-2/3) = 2/5*(-2/3) = -4/15
b) [tex]\sqrt{2}[/tex]([tex]\sqrt{32}[/tex]*[tex]\sqrt{8}[/tex]) = [tex]\sqrt{2}[/tex]*[tex]\sqrt{256}[/tex] = [tex]\sqrt{2}[/tex]*16 = 16[tex]\sqrt{2}[/tex] (co do tego nie jestem pewna)
c) 234,8-5,725 = 229,075
d) 12,3*2,57 = 31,611
e) 5,52/0,024 = 230
