−1/4+−3/5=
To add the fractions -1/4 and -3/5, we need to find a common denominator. The common denominator of 4 and 5 is 20.
Converting -1/4 to have a denominator of 20, we get -5/20.
Converting -3/5 to have a denominator of 20, we get -12/20.
Adding -5/20 and -12/20, we get (-5 - 12)/20 = -17/20.
Therefore, -1/4 + -3/5 = -17/20.
To add the fractions -1/4 and -3/5, you need to find a common denominator.
The least common denominator (LCD) for 4 and 5 is 20.
Next, you need to convert each fraction to have a denominator of 20.
For -1/4, you multiply both the numerator and the denominator by 5 to get -5/20.
For -3/5, you multiply both the numerator and the denominator by 4 to get -12/20.
Now that both fractions have the same denominator, you can add them:
-5/20 + -12/20 = -17/20.
So, -1/4 + -3/5 = -17/20.