Carla’s bedroom measures 8 feet by 12 feet. the area rug on the bedroom floor measures 6 feet by 10 feet.

what is the area of the floor that is not covered by the rug?

ft2

You can find the answer by subtracting the area of the rug by the area of the floor.  The area of the rug is 6*10=60ft^2.  The area of the floor is 8*12=96ft^2.  96ft^2-60ft^2=36ft^2.

The floor has 36 square feet not covered by the rug.