To simplify these expressions, we need to subtract the fractions.
-3/7 - 4/7 = (-3 - 4)/7 = -7/7 = -1
-1/9 - 2/9 = (-1 - 2)/9 = -3/9 = -1/3
5/8 + 7/8 = (5 - 7)/8 = -2/8 = -1/4
So, the simplified forms of the given expressions are:
To simplify these expressions, we need to subtract the fractions.
-3/7 - 4/7 = (-3 - 4)/7 = -7/7 = -1
-1/9 - 2/9 = (-1 - 2)/9 = -3/9 = -1/3
5/8 + 7/8 = (5 - 7)/8 = -2/8 = -1/4
So, the simplified forms of the given expressions are:
-1-1/3-1/4