Ladanian wants to write the fraction 4/6 as a sum of unit fractions. what expression should he write.

1/6 +1/6 +1/6+ 1/6= 4/6. A unit fraction has a numerator of 1 so since 4 is the numerator in 4/6 you would have to add 1/6 4 times. Hoped this helped you:)!!!