Andrew was making a science project for school. He worked for 6.6 hours the first week, 2.75 hours the second week, and 4.4 hours the third week.

Answer 1

To find the total number of hours Andrew worked on his science project, we can add the hours from each week together.

1. First week: 6.6 hours
2. Second week: 2.75 hours
3. Third week: 4.4 hours

Now, let's add them up:

\[ 6.6 + 2.75 + 4.4 \]

First, we can add 6.6 and 2.75:

\[ 6.6 + 2.75 = 9.35 \]

Next, we add the result to the hours from the third week:

\[ 9.35 + 4.4 = 13.75 \]

Therefore, the total number of hours Andrew worked on his science project is 13.75 hours.