Jen spent 1 1/2 hours working on ms thomkin car on Monday. She spent 2 3/4 more hours on Tuesday to finish the tune up. How many more hours in all did she work on ms thommin car

No.

1 2/4 + 2 3/4 = ?

Is the answer 4 1/4 hours

Yes. She spent 4 1/4 hours.

To find out how many more hours Jen worked on Ms. Thomkin's car, we need to add up the hours she spent on Monday and Tuesday.

On Monday, Jen spent 1 1/2 hours working on the car.
On Tuesday, she spent 2 3/4 hours on the car.

To add these two amounts, let's first convert the mixed numbers to improper fractions.

1 1/2 = (2 * 1) + 1 = 3/2
2 3/4 = (4 * 2) + 3 = 11/4

Now we can add the two improper fractions:

3/2 + 11/4 = (3 * 4 + 11 * 2) / (2 * 4) = (12 + 22) / 8 = 34/8 = 4 1/4

So, the answer is actually 4 1/4 hours, not 4 1/2 hours.