Oblicz najprostszym sposobem;
a) 4,5*8/5-4,5*(-0,8)
b) -2*3 1/3 +(-2)*1 1/6
c)5,25:(-5)+3 1/2: (-5)
a) = 10,8
b) = -9
c) = -4,15
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a) = 10,8
b) = -9
c) = -4,15