Решите пример:-12,7+(2½)
-12,7+2,5=-10,2 !!!!!!!!!!!!!!!!!!
-12,7+2 1/2=- 12 7/10 + 2 1/2 = - 127/10 + 5/2 = -127/10 + 25/10 = - 102/10 = - 51/5 = - 10 1/5= - 10,2