Levi takes 2.5 hours. If his dad helps him, then it takes 1 hour. How long does it take Levi’s dad to wash the car by himself?

1.5

Step-by-step explanation:

Because if it takes Levi 2.5 hours to wash the car and with the help of his dad it takes 1 hour then you have to subtract the amount 1 hour from 2.5 to get the answer.

Hope this helped!!!

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.