Решите -3/4+(-1/4) -5/17+(-6 12/17) -1+3/11 / это дробь.

1) -3/4 + (-1/4) = -1 * 3/4 + -1 * 1/4 = -1 * (3/4 + 1/4) = -1 * ( (3+1)/4) = -1 * (4/4) = -1 * 1 = -1
2) -5/17 + (-6 12/17) = -1 * (5/17) + -1 * 6 12/17 = -1 * (5/17 + 6 + 12/17) = -1 * (6 + (5+12)/17) = -1 * (6 + 17/17) = -1 * (6 + 1) = -1 * 7 = -7
3) -1 + 3/11 = 3/11 - 1 = 3/11 - 11/11 = (3 - 11)/11 = -8/11