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Oblicz:
a) -3 + 7 + (-4) + (-9) = 4 + (-4) + (-9) = 0 + (-9) = (-9)
b) -(-2) + (4 - 7) - (-3 + 5) = 2 + (-3) - 2 = (-1) - 2 = (-3)
c) 1/2 - (-6) - 3 1/4 + (-2) + 4 1/4 = 6 1/2 - 3 1/4 + (-2) + 4 1/4 = 1 1/4 + 4 1/4 = 5 1/2
d)2,5 + (-4,6) - 5,25 + (-2) + 7 1/4 = (-7,35) + (-2) + 7,25 = (-9,35) + 7,25 = (-2,1)
e) -[-3 1/4 - 4] - 5 1/2 + 1,25 = -(-3/4) - 5 1/2 + 1,25 = 3/4 - 5 1/2 + 1 1/4 = (-4 3/4) + 1 1/4 = 3 1/2
f) 10 1/2 + (-5 - 4,6) - 3 1/5 + (-2 + 5) + 1 3/5 = 10 1/2 + (-9,6) - 3 1/5 + 3 + 1 3/5 = 0,9 - 3.2 + 3 + 3,6 = (-2,3) + 3 + 3,6 = 0,7 + 3,6 = 4,3