cruzer101 cruzer101 13-02-2021 Mathematics contestada у 9- 8- 7+ 6+ 5+ 4+ 3+ 2+ 1+ -9 -8 -7 -6 -5 -4 -3 -2 2 3 4 5 6 7 8 9 -2+ -3- -4+ -5+ -6+ -7+ -8 -9