\begin{tabular}{l} Risolvi i problemi utilizzando le espressioni. \\ Matteo riceve dalla nonna 6 bustine di figurine \\ dei calciatori. Ogni bustina contiene 5 figurine. \\ Matteo si accorge che 7 figurine sono doppie. \\ Quante figurine può inserire nell'album? \\ \hline\end{tabular}

4. The population of a city is 67,721 and the neighboring city has a population of 52,103 . The difference between two cities is

Which of the following is an integer? Select all correct answers. Select all that apply: \( \square \frac{49}{6} \) \( \square-5 \) \( \square 8 \) \( \square-10 \) \( \square \frac{29}{3} \)

2. Max made 39 snowballs. Lucy made 35 more snowballs than Max. How many snowballs do Max and Lucy have altogether?

\begin{tabular}{l}\( 18 \times 6=6 \times 18 \) \\ \hline Select the correct answer below: \\ \hline Associative \\ \hline Commutative \\ Inverse \\ Identity \\ Distributive \\ \hline\end{tabular}

2. Reference books are for use in the library. There are 16 bookshelves for the reference books. After use, they need to be returned to a special collection box for shelving. If 128 reference books are in use and 84 reference books are in the collection box. how many reference books are on the shelf?