### Video Transcript

The temperature inside a house is
negative 14 degrees Fahrenheit, and the temperature outside is seven degrees
Fahrenheit lower. What is the temperature outside the
house?

We’re told in the question that the
temperature inside the house is negative 14 degrees Fahrenheit. Outside, it is seven degrees
lower. This means we need to subtract
seven degrees Fahrenheit from negative 14 degrees Fahrenheit.

In order to subtract seven from
negative 14, we can use a number line. We begin at negative 14 and move
seven places to the left. This takes us to negative 21. So, negative 14 minus seven is
negative 21.

We can, therefore, say that the
temperature outside the house is negative 21 degrees Fahrenheit.