Add:
`3/15 + 4/15`
= `(3 + 4)/15`
= `7/15`
`2/5 + 1/3`
`2/7 + 1/2`
`3 1/2` can be written as `3 + 1/2`
Add the following fractions
`1/5 + 3/5`
`3/9 + 7/9`
Sum of `4/17` and `15/17` is ______.
`25/19 + 6/19 = 31/38`
Add the fractions `3/8` and `2/3`.
Solve:
`1/18 + 1/18`
`1/4 + 0/4`