Oblicz najprostrzym sposobem.
a) (-6,2)+1/7+6,2-1/7+5=
b) 0,25+1 1/2+7+(-3/2+(-1/4)+(-7)=
c) -[-(-2)]+(-3)-{-[-(-5 1/2)]}
/-To jest kreska ułamkowa
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a) (-6,2) + 1/7 + 6,2 - 1/7 + 5 = (-6,2) + 6,2 + 5 = 0 + 5 = 5
b) 0,25 + 1 1/2 + 7 + (-3/2 ) + (-1/4) + (-7) = 1/4 + 3/2 + 7 + (-3/2 ) + (-1/4) + (-7) = 0
c) -[-(-2)]+(-3)-{-[-(-5 1/2)]} = (-2) + (-3) - (-5 1/2) = (- 2) + (-3) + 5 1/2 = (-5) + 5 1/2 = 1/2