To add these fractions, we need to find a common denominator.
The common denominator for 5 and 4 is 20.
So, we need to rewrite 1/5 as 4/20 and 1/4 as 5/20:
4/20 + 5/20 = 9/20
Therefore, 1/5 + 1/4 = 9/20.
1/5 + 1/4
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