*a) To fill a sticker album, Karina contributed while Cristina contributed of the stickers. With what fraction of the stickers did the two together contribute?*

*Ana is reading a book. One day she read **of the book and the next day read from the book. Then calculate:*

*b) the fraction of the book she has read.*

*c) the fraction of the book that she needs to finish reading.*

*d) In a package there are * *1 kg of sugar. In another package there is . How many pounds of sugar does the first pack have more than the second?*

*e) The street where Claudia lives is being paved. The * *from the street have already been paved. What fraction of the street is left asphalt?*

*Calculate:*

*f) *

g)

*On the day of the launch of an apartment building, * *of these apartments was sold and has been booked. Like this:*

*h) What fraction of the apartments was sold and reserved?*

*i) What fraction corresponds to the apartments that were not sold or reserved?*

*j) Calculate the value of the expression: *