(−1) + (−2) =
|−1| + |−2| =
1 2
1 + 2 = −3
(−2) + (−4) =
|−2| + |−4| =
2 4
2 + 4

(−4) + (−8) =
|−4| + |−8| =
4 8
4 + 8 = −12

(−8) + (+16) =
|−8| + |+16| =
8 16
16 − 8 = +8

(+16) + (+32) =
|+16| + |+32| =
16 32
16 + 32 = +48

(−1) + (+1) =
|−1| + |+1| =
1 1
1 − 1 = 0

(+7) + (−7) =
|−7| + |+7| =
7 7
7 − 7 = 0