1) -9,54 + (-3,42) + 7,54 + 3,42 = (-9,54 + 7,54) + ((-3,42) + 3,42 ) = -2
2) -5,36 + 8,71 + 2,36 + (-22,71). = (-5,36 + 2,36 ) + (8,71 + (-22,71)) =
=-3 -14 = -17
1) -9,54 + (-3,42) + 7,54 + 3,42 = (-9,54 + 7,54) + ((-3,42) + 3,42 ) = -2
2) -5,36 + 8,71 + 2,36 + (-22,71). = (-5,36 + 2,36 ) + (8,71 + (-22,71)) =
=-3 -14 = -17