Сравните:
а) |3| + |7| и |3 + 7|;
б) |−1| + |10| и |(−1) + 10|;
в) |−6| + |5| и |(−6) + 5|;
г) |−5| + |−8| и |(−5) + (−8)|.
|3| + |7| = 3 + 7 = 10;
|3 + 7| = |10| = 10;
10 = 10;
|3| + |7| = |3 + 7|.
|−1| + |10| = 1 + 10 = 11;
|(−1) + 10| = |9| = 9;
11 > 9;
|−1| + |10| > |(−1) + 10|.
|−6| + |5| = 6 + 5 = 11;
|(−6) + 5| = |−1| = 1;
11 > 1;
|−6| + |5| > |(−6) + 5|.
|−5| + |−8| = 5 + 8 = 13;
|(−5) + (−8)| = |−13| = 13;
13 = 13;
|−5| + |−8| = |(−5) + (−8)|.