Решите два примера . : 1) -5/18+(-4/81)+7/18+13/81= 2) 3 5/11+1 3/8+ 2 5/16+(-4 6/11)=

1) -5/18 - 4/81 + 7/18 + 13/81 = 2/18 + 9/81 = 1/9 + 1/9 = 2/9
2) 3 5/11 + 1 3/8 + 2 5/16 - 4 6/11 = 38/11 - 50/11 + 22/16 - 37/16 = -12/11 - 15/16 = -1 1/11 - 15/16