Can I add 1/4 + 1/4 here?
No, since the wholes are of different sizes.
Write the fraction as the sum of unit fractions.
1/6 + 1/6 + 1/6 + 1/6 + 1/6
Write the fraction as the um of fractions in 3 different ways.
4/10 + 4/10 and 3/10 + 5/10 and 1/10 + 7/10