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b) - 16 + 67 + (-10) + (-7) + 66 = -16+67-10-7+66=100
c) 2 i dwie piąte + (-4,1) + 7 i trzy piąte + (-5,9)= 2,4 - 4,1 + 7,6 - 5,9=0
d) 4 ⁴₇ + 5,4 + (-1⁴₇) + (7,4) = 64 + 5,4 - 1 + 7,4 = 75,8
e) -0,75 + 6,3 _ (-1,1) + (-¼) + (-6,3) = -0,75 + 6,3 + 1,1 - 0,25 - 6,3=0,1