Question

Deborah’s playlist on her MP3 player had a variety of songs on it. She had 21 country songs, 18 alternative songs, 16 pop songs and 18 rock songs. Use the bar diagram to write and evaluate two numerical expressions to represent the total number of songs.

Answer 1

There are 73 number of songs in Deborah’s MP3 player.

Here are two numerical expressions that represent the total number of songs on Deborah's MP3 player:

Expression 1:

21 + 18 + 16 + 18 = 73

This expression simply adds up the number of songs in each category.

Expression 2:

4 (country songs) + 4 (alternative songs) + 4 (pop songs) + 4 (rock songs) = 16

This expression uses the fact that Deborah has 4 songs in each of her four favorite categories.

Both expressions are correct and represent the total number of songs on Deborah's MP3 player, which is 73 songs.