dudamsv dudamsv 31-05-2023 Mathematics contestada a) + 3 + 5+2 -1-6-3 = b)-4-2-7-8 + 10 + 11 = c) + 9 +5-4-7-9-1= d) + 25 15 + 21 - 12 = e)-2-3-7-8-9-3=
