The correct answers are:
40 songs;
48 songs; and
56 songs.
Explanation:
Since each class sings 8 songs per week, to find the number of songs for any given number of weeks, we multiply:
8 songs per week * 5 weeks = 40 songs
8 songs per week * 6 weeks = 48 songs
8 songs per week * 7 weeks = 56 songs
